Sulfur-and selenium-promoted cyclization of allenic phosphonates and phosphinates to substituted 1, 2-oxaphosphol-3-enes: stereochemical consequences at …
RS Macomber, GA Krudy, K Seff…
文献索引：Macomber, Roger S.; Krudy, George A.; Seff, Karl; Rendon-Diazmiron, L. E. Journal of Organic Chemistry, 1983 , vol. 48, # 9 p. 1425 - 1430
Results While the reaction of allenes with sulfur electrophiles has been studied over 2 decades: only recently has the corresponding reaction with selenium electrophiles been e~ amined.~" We chose as prototype substrates a series of allenic phosphoryl derivatives having either no (4a), one (4b), or two (4c, 4d, 5, 6) C-terminal substituents, avoiding as much as possible those esters previously examined.'In our initial experiments we used the ...
