An Unexpected Transannular [4+2] Cycloaddition during the Total Synthesis of (+)‐Norcembrene?5

摘要

Abstract >We report a concise and versatile total synthesis of the diterpenoid (+)‐norcembrene?5 from simple building blocks. Ring‐closing metathesis and an auxiliary‐directed 1,4‐addition are the key steps of our synthetic route. During the synthesis, an unprecedented, highly oxidized pentacyclic structural motif was established from a furanocembranoid through transannular [4+2] cycloaddition. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> 我们报告了一种简洁而多功能的含二萜（+） - NORCEMBRENE？5来自简单构建块。闭环复分解和辅助定向的1,4--添加是我们合成路线的关键步骤。在合成期间，从呋喃聚集通过杂蛋白通过血管杂交[4 + 2]环加成，建立前所未有的高度氧化的五环结构基质。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-19011/'>《Angewandte Chemie》</a> <b style="margin: 0 2px;">|</b><span>2020年第14期</span><b style="margin: 0 2px;">|</b><span>共5页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1188.html" title="应用化学">应用化学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Diels–Alder reaction&option=203" rel="nofollow">Diels–Alder reaction;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ring-closing metathesis&option=203" rel="nofollow">ring-closing metathesis;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=terpenoids&option=203" rel="nofollow">terpenoids;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=total synthesis&option=203" rel="nofollow">total synthesis;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=transannular cycloaddition&option=203" rel="nofollow">transannular cycloaddition;</a> </p> <div class="translation"> 机译：Diels-Alder反应;闭环复分解;Terpenoids;总综合;几瓣环加成; 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Paiva&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Fernanda C. R. Paiva,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Robert Jenkins&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Robert Jenkins,</a> <span>2019</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：意外的酶催化4 + 2环加成和重氮中的聚醚抗生素生物合成</span> </p> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/academic-journal-cn_journal-central-south-university-science-technology_thesis/0201248320334.html">邻亚甲基醌和3-氯吲哚啉酮4+1环加成合成螺环吲哚啉酮</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=杜升华&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 杜升华</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=周吉&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,周吉</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=江国防&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,江国防</a> <span> <a href="/journal-cn-4543/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 中南大学学报（自然科学版） </a> </span> <span> . 2018</span><span>,第005期</span> </span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/academic-journal-cn_chinese-journal-antibiotics_thesis/0201242072632.html">单环β—内酰胺环合成化学（2）：由双分子的加成环合制备环的方法</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=魏长富&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 魏长富</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李正化&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李正化</a> <span> <a href="/journal-cn-6415/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 中国抗生素杂志 </a> </span> <span> . 1989</span><span>,第006期</span> </span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/academic-journal-cn_chemical-journal-chinese-universities_thesis/0201231647302.html">磷杂螺环化合物的合成——3，9-二氢-3，9-二硫代-2，4，8，10-四氧杂-3，9-二磷杂螺环5，5十一烷的合成及其与α-芳基-β-硝基烯的加成反应</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李玉桂&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 李玉桂</a> <span> <a href="/journal-cn-10958/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 高等学校化学学报 </a> </span> <span> . 1994</span><span>,第004期</span> </span> </div> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/academic-journal-cn_shandong-chemical-industry_thesis/0201288520432.html">N-烷基肉桂醛硝酮与苯炔环加成合成苯并异噁唑啉</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=章林&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 章林</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=段深蓝&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,段深蓝</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=谌小帆&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,谌小帆</a> <span> <a href="/journal-cn-9186/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 山东化工 </a> </span> <span> . 2021</span><span>,第005期</span> </span> </div> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/academic-journal-cn_journal-changzhou-university-natural-science-edition_thesis/0201280054617.html">Huisgen3+2环加成/N-芳基化串联反应合成三氮唑苯二氮卓化合物</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=马晓明&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 马晓明</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=杨桂翔&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,杨桂翔</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=杨泽熙&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,杨泽熙</a> <span> <a href="/journal-cn-7555/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 常州大学学报（自然科学版） </a> </span> <span> . 2020</span><span>,第006期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-578_thesis/020221239447.html">通过金催化的形式3+2环加成合成2-氨基吡咯化合物</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=肖新宇&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 肖新宇</a> <span> <a href="/conference-cn-578/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第八届全国大学生创新创业年会 </a> <span> <span> . 2015</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020313021557.html">呋咱吡嗪类含能化合物的合成及环加成合成四唑环的研究</a> 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