Alkylidene Carbene from Silyl Vinyl Iodide Provides Mechanistic Insights on Trimethylenemethane Diyl-Mediated Tandem Cyclizations
作者:Dong Whan Jee、Jinnie Myung、R. Daniel Little、Sunkyu Han、Hee-Yoon Lee
DOI:10.1021/acs.orglett.2c01622
日期:2022.6.24
We describe a method to generate alkylidenecarbenes via tetramethylammonium-fluoride-induced desilylation of silyl vinyl iodides. The reversible carbenegenerationfrom an iodovinyl anion enabled us to unearth mechanistic aspects of the trimethylenemethane (TMM) diyl cyclization reaction that could not be explored via previous methods. We observed that a slow diyl–diylophile cycloaddition can induce
Stereoselectivity in Trimethylenemethane (TMM) Diyl Mediated Cycloaddition Reaction to Angularly Fused Triquinanes
作者:Yeokwon Yoon、Taek Kang、Hee-Yoon Lee
DOI:10.1002/asia.201000672
日期:2011.2.1
the TMMdiylmediated [2+3] cycloadditionreaction of monosubstituted linear substrates to form angularlyfusedtriquinanes was carried out. Substitution at position 3 provided complete diastereoselectivity, while positions 1 and 4 induced marginal stereoselectivity. Position 2 did not show any influence on the diastereoselectivity. Position 4 turned out to be incompatible with the cycloaddition reaction