Synthesis and enzymatic resolution of novel analogs of alicyclic and heterocyclic mandelic acid derivatives
作者:Bohdan S. Sosunovych、Oleksii S. Timokhin、Olexandr V. Kucher、Nadiia Y. Demianyk、Denys V. Hys、Yelyzaveta A. Zvarych、Oleg B. Smolii、Bohdan V. Vashchenko、Oleksandr O. Grygorenko
DOI:10.1016/j.tet.2024.134068
日期:2024.7
Synthesis and enzymatic resolution of a new class of alicyclic and heterocyclic mandelic acidderivatives was described. The method relied on the preparation of cyanohydrins from the commercially available aldehydes followed by hydrolysis to corresponding racemic hydroxy esters that were used in the resolution with the enzyme. An alternative approach was proposed for compounds that were not suitable
Bis-trimethylsilylacetamide: A reagent for the control of Friedel-Crafts alkylation reactions using methyl chloromethoxyacetate
作者:Martyn J. Earle、Robin A. Fairhurst、Harry Heaney
DOI:10.1016/0040-4039(91)80781-z
日期:1991.10
The Friedel-Crafts alkylation reactions of electron rich aromatic compounds using methyl alpha-chloro-alpha-methoxyacetate and Lewis acids leads predominantly to the formation of diarylacetic acid derivatives in which the second stage of the sequence is favoured by the presence of hydrogen chloride generated in the first step; effective control can be achieved in a number of cases by the addition of bis-trimethylsilylacetamide.
OGURA, KATSUYUKI;WATANABE, JUN-ICHI;TAKAHASHI, KAZUMASA;IIDA, HIROTADA, J. ORG. CHEM., 1982, 47, N 27, 5404-5406