n-pentyl 1-methyl-1H-tetrazol-5-yl (MT) sulfone 1a in the Julia-Kocienski reactions were compared with those of the PT sulfone 1b and the TBT sulfone 1c. The improved stability of the anion derived from the n-pentyl MT sulfone 1a enhanced the efficiency of the olefination reactions and gave higher yields of the product alkenes 3 compared with the PT sulfone 1b. Especially high E-selectivity and high
Olefination of activated halides and mesylates using arsonium ylides
作者:André Seyer、Lilian Alcaraz、C. Mioskowski
DOI:10.1016/s0040-4039(97)10152-6
日期:1997.11
Alkyltriphenylarsonium ylides react with activated primary halides and mesylates to afford olefins in good yields and with high E-selectivity. (C) 1997 Elsevier Science Ltd.