以3,4-二羟基苯丙烯酸(咖啡酸)为原料,经酯化和仿生氧化偶联反应得到苯并呋喃类化合物2-(3′,4′-二羟基苯基)-3-甲氧羰基-5-甲氧羰基乙烯基-7-羟基-2,3-二氢苯并呋喃(1)和苯并二氧六环类化合物2-(3′,4′-二羟基苯基)-3-甲氧羰基-6-甲氧羰基乙烯基-2,3-二氢-1,4-苯并二氧六环(2),然后经乙酰化、DDQ氧化脱氢、Pd/C 催化氢化、氢化铝锂还原、碱性条件下脱乙酰基等反应,合成了一系列苯并呋喃新木脂素类化合物3~7和苯并二氧六环新木脂素类化合物8~10.所合成化合物的结构已由核磁共振法(1 H NMR,13 C NMR)、质谱法(MS)进行了表征.其中5~7,9和10是未见文献报道的新化合物,8为天然产物异美商陆醇A.采用MTT法对所合成的苯并呋喃新木脂素类化合物1,3~5进行了生物活性测试.结果表明：化合物1,3,4和5对白血病细胞(HL-60)、肺癌细胞(A-549)、乳腺癌细胞(MCF-7)、结肠癌细胞(SW-480)、肝癌细胞(SMMC-7721)有良好的体外生长抑制活性.%Benzofurans compound 2-(3',4'-dihydroxyphenyl)-3-methoxy carbonyl-5-methoxy carbonyl vinyl-7-hydroxy-2,3-dihydrobenzofuran (1)and benzodioxanes compound 2-(3',4'-dihydroxyphenyl)-3-me-thoxy carbonyl-6-methoxy carbonyl vinyl-2,3-dihydro-1,4-benzodioxane (2)were synthesized from caffeic acid through esterification and biomimetic oxidative coupling reactions.Moreover,a series of benzofuran-neolignan compounds 3~7 and benzodioxaneneolignan compounds 8~10 were synthesized from compounds 1 and 2 respectively through acetylation,DDQ oxydehydrogenation,Pd/C catalytic hydrogenation,lithium aluminium hydride reduction and deacetylation in alkaline condition.All of these synthesized compounds were confirmed with MS,IR,1 H NMR and 13 C NMR spectra.Among them,5~7,9 and 10 are new com-pounds.8 is the natural product isoamericanol A.The biological activities of benzofuranneolignan com-pounds 1 ,3~5 against five human cancer cell lines were evaluated in the standard MTT method,and the results have shown that compounds1,3,4 and 5 exhibit good inhibitory effect on leukemia cells (HL-60), lung carcinoma cell (A-549),breast cancer cell (MCF-7),colon cancer cell (SW-480),and hepatoma car-cinoma cell (SMMC-7 7 2 1 ).
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