Asymmetric Synthesis of Derivatives of dihidrobenzofurano

摘要

Item 1: a method for manufacturing E-type compounds: R1 and R2 are hydrogen, chlorine, fluorination, ch-oh, c1-8, perfluoroalkyl C1-6, alcox C1-6, perfluoroalcoxy C1-6, 6-10 Mimosa 6-10, 6-10 6-10 ariloxi, 5-10 non biological members, 1-4 selected non biological atoms, respectively, Independently extracted from 1 to 3 independently from 1 to 3 sulfur amides selected from nitrobenzene, oxygen or sulfur, alquenilo C2-8, C1-6, 1 to 6 carbon atoms of deoxydiene, C3-8 cyclopropene or 3 to 8 heteroatoms of heteropropylene; or R1 and R2,When they're next to each otherThey can form a part of a single cycle cycle cycle cycle cycle cycle cycle cycle cycle cycle cycle consisting of 3 to 8 carbon atoms, a bridge cycle consisting of 5 to 10 carbon atoms, a part of a single cycle cycle cycle cycle cycle cycle cycle cycle cycle cycle cycle cycle consisting of 3 to 8 members, with 1 to 3 independent heteroatoms, Nitroglycerin, oxygen or sulfur, arilo of 6-10 points or heterogeneity of 5-10 points, 1-3 heteroatoms independently selected from nitroglycerin, oxygen or sulfur, Where single cycle or heterocycle cycles may be replaced by a single carbon atome. E is br, CL or I, which consists of 3-5 members and 1-2 independently selected heteroatoms to form a spiral group; E is br, CL or I, including (a) providing a D-class non coccal compound (a), in which BR, CL or I; R8 is hydrogen; Or an appropriate hydroxyl group, and (b) circulate the compound from formula d to form a formula E.