Stereoselective Synthesis of D-Erythrose and D-Threose Derivatives from D-Glyceraldehyde Acetonide and Their Reactions with 1-(Trimethylsilyl)vinyl Cuprate Reagent. Synthesis of Allitol Hexaacetate
作者:Masato Kusakabe、Fumie Sato
DOI:10.1246/cl.1986.1473
日期:1986.9.5
A new and efficient route to the synthesis of trialkoxy derivatives of D-erythrose (1) and D-threose from readily available D-glyceraldehyde acetonide was developed. The addition reaction of 1 with 1-(trimethylsilyl)vinyl cuprate reagent proceeded highly stereoselectively to afford anti addition product, which was then readily converted into allitol hexaacetate.
Diastereoselective addition of lower order vinylcuprates to (R)-2,3-O-Isopropylideneglyceraldehyde
作者:Peter Metz、Andreas Schoop
DOI:10.1016/s0040-4020(01)81551-9
日期:1993.1
Highly syn or anti selective addition of lower order lithium vinylcuprates generated from alkenyl bromides 1 to (R)-2,3-O-isopropylideneglyceraldehyde (2) can be achieved, respectively, depending on the substitution pattern of the vinyl moiety and the solvent. Alpha-Trimethylsilyl substituted vinylcuprates possessing an alkyl substituent Z to copper react with excellent syn selectivity in ether whereas a highly anti selective addition is observed for cuprates bearing a hydrogen atom Z or alpha to the metal in THF. A model is proposed to rationalize these complementary selectivities.
SATO, FUMIE;KOBAYASHI, YUICHI;TAKAHASHI, OSAMU;CHIBA, TSUNEHISA;TAKEDA, Y+, J. CHEM. SOC. CHEM. COMMUN., 1985, N 22, 1636-1638