epoxides;
aluminium and compounds;
alkynes;
zirconium;
and compounds;
silyl ether selective oxidation;
Wittig reactions;
D O I:
10.1016/j.tetiet.2004.04.033
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
The synthesis of the enantiopure C-1-C-11 fragment of bafilomycin A(1) has been achieved with a 4% overall yield over 18 steps from (R)-(+)-citronellol. Key steps involve Sharpless asymmetric epoxidation, Miyashita reaction of a gamma,delta-epoxymethacrylate with trimethylaluminum in the presence of water, bis-OTMS selective Swern oxidations, Corey-Fuchs alkyne formation, Negishi's carbometalation, and stereoselective formation of the C-2-C-3 trisubstituted bond of the conjugated diene by a Wittig-type olefination of the alpha, beta-unsaturated C-3-C-11 aldehyde with the ylide derived from the readily available phosphonium salt [Cl-, Ph3P+CH(OMe)COOMe]. (C) 2004 Elsevier Ltd. All rights reserved.
机构:
Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea, Republic ofDepartment of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea, Republic of
Park, Su Ho
Min, Jae Ki
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机构:
Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea, Republic ofDepartment of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea, Republic of
Min, Jae Ki
Park, Se Hwan
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机构:
Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea, Republic ofDepartment of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea, Republic of