C-Allylation of 1- and 6-Bromosugars with Allylic Sulfides and Sulfones
摘要:
Reaction of the bromosugars 2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl bromide (1), methyl 2,3-anhydro-6-bromo-6-deoxy-alpha-D-allopyranoside (2), and methyl 2,3-anhydro-4-O-benzoyl-6-bromo-6-deoxy-alpha-D-allopyranoside (3) with the-allylic sulfides and sulfones 4-9 in the presence of hexabutyldistannane under photolytic conditions gave the corresponding alpha-C-allyl galactosides 10-12 and the 6-C-allylated epoxysugars 13, 15, and 16 in 61-90% yield.
C-Allylation of 1- and 6-Bromosugars with Allylic Sulfides and Sulfones
摘要:
Reaction of the bromosugars 2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl bromide (1), methyl 2,3-anhydro-6-bromo-6-deoxy-alpha-D-allopyranoside (2), and methyl 2,3-anhydro-4-O-benzoyl-6-bromo-6-deoxy-alpha-D-allopyranoside (3) with the-allylic sulfides and sulfones 4-9 in the presence of hexabutyldistannane under photolytic conditions gave the corresponding alpha-C-allyl galactosides 10-12 and the 6-C-allylated epoxysugars 13, 15, and 16 in 61-90% yield.
One-pot Synthesis of Allyl Sulfides from Sulfinate Esters and Allylsilanes through Reduction of Alkoxysulfonium Intermediates
作者:Akihiro Kobayashi、Tsubasa Matsuzawa、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1246/cl.200285
日期:2020.7.5
An efficient method to synthesize allyl sulfides from sulfinate esters and allylsilanes is described. Based on the reactivity of isolated allyl(methoxy)phenyl sulfonium triflate, we have developed ...