Total synthesis of (+)-trienomycins A and F via C-C bond-forming hydrogenation and transfer hydrogenation.
Total synthesis of (+)-trienomycins A and F via C-C bond-forming hydrogenation and transfer hydrogenation.
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DOI:
10.1021/ja4061273
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发表时间:
2013-07-31
影响因子:
15
通讯作者:
Krische MJ
中科院分区:
文献类型:
--
作者:
Del Valle DJ;Krische MJ
The triene-containing C17-benzene ansamycins trienomycins A and F are prepared in 16 steps (longest linear sequence, LLS) and 28 total steps. The C11-C13 stereotriad is prepared via enantioselective ruthenium catalyzed alcohol CH-syn-crotylation followed by chelation-controlled carbonyl dienylation. Enantioselective rhodium catalyzed acetylene-aldehyde reductive coupling mediated by gaseous hydrogen forms a diene that ultimately is subjected to diene-diene ring closing metathesis to form the macrocycle. The present approach is 14 steps shorter (LLS) than the prior syntheses of trienomycins A and F, and 8 steps shorter (LLS) than any prior synthesis of a triene-containing C17-benzene ansamycin.
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