Scalable, Catalytic Asymmetric Synthesis of Syn, Anti Stereotriad Building Blocks for Polypropionate Antibiotics
摘要:
Asymmetric catalysis and chirality transfer by the 2,3-Wittig rearrangement were combined to provide a syn, anti stereotriad-containing olefinic alcohol in five steps from inexpensive starting materials. Development of this compound, a versatile intermediate for polypropionate synthesis, gave known building blocks for discodermolide.
Intermediates for the synthesis of polypropionate antibiotics
申请人:The Research Foundation of State University of New York
公开号:US07297807B1
公开(公告)日:2007-11-20
The invention relates to intermediate compounds of the formula
wherein R1 is H or a protecting group, R2 and R3 each independently represent H, methyl, or a leaving group, provided that at least one, but not both, of R2 and R3 is a leaving group. The intermediate compounds are useful for the synthesis of discodermolide, its derivatives, and related compounds.
Enantioselective addition of (Z)- and (E)-alkenylzinc bromides to aldehydes: asymmetric synthesis of sec-allylalcohols
作者:Wolfgang Oppolzer、Rumen N. Radinov
DOI:10.1016/s0040-4039(00)93553-6
日期:1991.10
In situ prepared (Z)- and (E)-1-alkenylzinc bromides 5 were added to various aldehydes 1 in the presence of lithiated (+)-N-methylephedrine or (+)-2-(N,N-dimethylamino)-1,2-diphenylethanol to give sec. allyalcohols 7 in high optical purity with simple recovery of the chiral aminol 6.
INTERMEDIATES FOR THE SYNTHESIS OF POLYPROPIONATE ANTIBIOTICS
申请人:Parker Kathlyn
公开号:US20070282121A1
公开(公告)日:2007-12-06
The invention relates to intermediate compounds of the formula
wherein R
1
is H or a protecting group, R
2
and R
3
each independently represent H, methyl, or a leaving group, provided that at least one, but not both, of R
2
and R
3
is a leaving group. The intermediate compounds are useful for the synthesis of discodermolide, its derivatives, and related compounds.