The regioselectivity of rhodium and palladium-catalysed cyclisations of 2-bromo-1,6- and -1,7-dienes
作者:Ronald Grigg、Paul Stevenson、Tanachat Worakun
DOI:10.1016/s0040-4020(01)90346-1
日期:1988.1
Rhodium- and palladium-catalysed formation of conjugated mono- and bis-exocyclic dienes. 5-Exo-trig versus 6-endo-trig cyclisations
作者:Ronald Grigg、Paul Stevenson、Tanachat Worakun
DOI:10.1039/c39840001073
日期:——
2-Bromo-1,6-dienes are catalytically cylised to give conjugated 5-membered bis-exocylic dines and 6-membered mono-exocyclic dienes by rhodium and palladium catalysts, the specificity for a 5- or 6-membered ring being a function of substrate, catalyst, and added base; 2-bromo-1,7-dienes cyclise regiospecifically to give 6-membered rings.