Facile Deprotection of Bulky (Trialkylsilyl)acetylenes with Silver Fluoride
作者:Sanghee Kim、Bogyeong Kim、Jinkyung In
DOI:10.1055/s-0029-1216788
日期:2009.6
the deprotection of bulky (trialkylsilyl)acetylenes. Treatment of 1-(triisopropylsilyl)acetylenes with silver fluoride, followed by hydrolysis of the intermediate silver acetylide with organic or inorganic acids, produces terminal acetylenes in good to excellent yields. The reactions are chemoselective and various functional groups are tolerated. desilylation - trialkylsilyl - silver fluoride - chemoselectivity
Facile one-pot syntheses of bromoacetylenes from bulky trialkylsilyl acetylenes
作者:Taeho Lee、Hee Ryong Kang、Shinae Kim、Sanghee Kim
DOI:10.1016/j.tet.2006.02.016
日期:2006.4
1-trialkylsilylacetylenes to haloacetylenes in situ remains desirable, especially when the corresponding terminal acetylenes are unstable. Using AgF and NBS, we have successfully transformed various 1-(trialkylsilyl)acetylenes, including bulky trialkylsilylacetylenes, into bromoacetylenes in high yield. The reactions are chemoselective: triisopropylsilyl ethers were not deprotected under these conditions.
Synthesis of Polyynes by In Situ Desilylative Bromination and Palladium-Catalyzed Coupling: (7-(Benzyloxy)Hepta-1,3,5-Triynyl)Triisopropylsilane
作者:Soonho Hwang、Hee Ryong Kang、Sanghee Kim
DOI:10.1002/0471264229.os086.22
日期:2009.12.18
A New, Iterative Strategy for the Synthesis of Unsymmetrical Polyynes: Application to the Total Synthesis of 15,16-Dihydrominquartynoic Acid
作者:Sanghee Kim、Shinae Kim、Taeho Lee、Hyojin Ko、Deukjoon Kim
DOI:10.1021/ol0484963
日期:2004.9.1
[reaction: see text] A new iterativestrategy for the synthesis of unsymmetrically substituted polyynes has been developed. The starting bromoalkyne is homologated by one acetylene unit through palladium-catalyzed cross-coupling with a TIPS-protected terminal acetylene and a subsequent in situ one-pot AgF-mediated desilylative bromination. The utility of this new synthetic method is demonstrated by