Ring-opening metathesis–cross-metathesis reactions (ROM–CM) of substituted norbornadienes and norbornenes
作者:Peter Mayo、William Tam
DOI:10.1016/s0040-4020(02)01276-0
日期:2002.11
This study provides an efficient method for the stereoselective synthesis of highly substituted cyclopentenoids. Long-range electronic effect of a remote substituent on unsymmetrical norbornenes in the ROM–CM reactions was also investigated. Low levels of regioselectivities were observed (50:50 to 69:31) with various remote substituents on the norbornenes.
Reactivity of the alkene component in the ruthenium-catalyzed [2+2] cycloaddition between an alkene and an alkyne: Part 2
作者:Robert W Jordan、William Tam
DOI:10.1016/s0040-4039(02)01191-7
日期:2002.8
Ruthenium-catalyzed [2+2] cycloadditions of 2,3-disubstituted norbornadienes and 2-substituted norbornadienes with an alkyne were found to be highly chemo- and stereoselective with moderate level of regioselectivities and only small rate differences were observed with different substituents on the norbornadiene. (C) 2002 Elsevier Science Ltd. All rights reserved.