8-Endo Cyclization of (Alkoxycarbonyl)methyl Radicals: Radical Ways for Preparation of Eight-Membered-Ring Lactones
作者:Eun Lee、Cheol Hwan Yoon、Tae Hee Lee、Sun Young Kim、Tae Joon Ha、Yong-suk Sung、Sang-Hyun Park、Sangyoub Lee
DOI:10.1021/ja980908d
日期:1998.8.1
Cyclization of (alkoxycarbonyl)methyl radicals generated from bromoacetates proceeds in the 8-endo mode to generate heptanolactones. Three distinct types of 8-endo/5-exo tandem radical cyclizations produce different bicyclic heptanolactones. In certain cases, intramolecularfree-radical attack on the heptanolactone carbonyl group initiates further skeletal rearrangement. Ab initio calculations indicate
Preparation of seven-membered ring cyclic ethers and 3-alkylidenetetrahydropyrans from the cyclization of oxonium cations derived from unsubstituted and silicon-containing 4-alken-1-ols
作者:Armando Castaneda、David J. Kucera、Larry E. Overman
DOI:10.1021/jo00285a016
日期:1989.11
Total synthesis of (-)-laurenyne. Use of acetal-initiated cyclizations to prepare functionalized eight-membered cyclic ethers
作者:Larry E. Overman、Andrew S. Thompson
DOI:10.1021/ja00215a040
日期:1988.3
CASTANEDA, ARMANDO;KUCERA, DAVID J.;OVERMAN, LARRY E., J. ORG. CHEM., 54,(1989) N4, C. 5695-5707
作者:CASTANEDA, ARMANDO、KUCERA, DAVID J.、OVERMAN, LARRY E.
DOI:——
日期:——
OVERMAN, LARRY E.;THOMPSON, ANDREW S., J. AMER. CHEM. SOC., 110,(1988) N 7, 2248-2256