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lgq101

木虫 (小有名气)

[求助] 求翻译!!!急~~~谢谢

Next, the reaction pathway was branched to form the enyne substrates 3 by N-allylation and the diyne substrates 4 by N-propargylation (18, 19). Notably, the TBDAS linker withstood these strongly basic reaction conditions, and the reactions proceeded in good yields, comparable to those previously obtained in solution phase (3a, 87% vs. 98%; 3b, 72% vs. 76%; 3c, 88% vs. 80%; 3d, 81%; 4a, 86% vs. 82%; 4b, 82% vs. 90%; 4c, 85% vs. 82%; 4d, 79%) (12). Because the terminal alkynes (3d, 4d) were more broadly effective substrates compared to the trimethylsilyl (TMS)-alkynes (3c, 4c) in the original solution-phase studies (12), and afford identical products after desilylation, the former were used in most of the subsequent transition metal-mediated cycloaddition and cyclization reactions.

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zuodg

铁杆木虫 (正式写手)

有为青年

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sltmac(金币+1): 谢谢交流~~ 2011-06-11 09:43:02
lgq101(金币+10, 翻译EPI+1): 真是非常感谢你啊,每次都是得到你的帮助~~~ 2011-06-11 23:32:06
接下来,反应路径通过N-丙烯基反应分支形成烯炔底物3,通过炔丙基化反应形成二炔底物4(18,19)。需要指出的是,与以前溶液中进行的反应相比((3a, 87% vs. 98%; 3b, 72% vs. 76%; 3c, 88% vs. 80%; 3d, 81%; 4a, 86% vs. 82%; 4b, 82% vs. 90%; 4c, 85% vs. 82%; 4d, 79%)(12),TBDAS能够承受强酸反应条件,而且反应产率很高。与溶液反应产物三甲基硅-炔烃相比,(固相反应)末端炔类产物(3d,4d)是更广泛有效的底物(12)。脱甲基硅反应之后末端炔烃产物能够生成相同的产物。末端炔烃也可进行大多数过渡态金属介导的环加成与环化反应
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2楼2011-06-11 01:06:40
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