Asymmetric synthesis based on chiral diamines having pyrrolidine ring
作者:Teruaki Mukaiyama
DOI:10.1016/s0040-4020(01)93286-7
日期:——
Various highly stereoselective asymmetric reactions based on chiral diamines having pyrrolidine ring are described. Some of these reactions have been successfully applied to the syntheses of natural products.
Highly Diastereoselective Reaction of Chiral o-(2-(1,3-Oxazolidinyl))benzaldehydes with Alkylmetallic Reagents: Synthesis of Chiral 3-Substituted Phthalides.
Highly diastereoselective reaction of chiral o-[2-(1, 3-Oxazolidinyl)]benzaldehydes (4-6) with alkylmetallic reagents provides a new synthetic method for chiral 3-alkylphthalides.
Enantioselective dialkylation of 1,2-phthalicdicarboxaldehyde
作者:Henk Kleijn、Johann T.B.H Jastrzebski、Jaap Boersma、Gerard van Koten
DOI:10.1016/s0040-4039(01)00586-x
日期:2001.6
procedure is reported for the enantioselective synthesis of C2-symmetric diols derived from 1,2-phthalicdicarboxaldehyde. The first step involves the enantioselectiveaddition of a dialkylzinc compound to one of the aldehyde groups, affording a lactol organozinc derivative. In the second step this lactol derivative is converted to the appropriate diol with the aid of a Grignard reagent and subsequent hydrolysis
A facile synthesis of optically active 3-ethyl- and 3-butylphthalides via catalytic enantioselective addition of dialkylzinc reagents to o-phthalaldehyde