69367-52-8Relevant academic research and scientific papers
Diastereo- And Enantioselective Synthesis of Quaternary α-Amino Acid Precursors by Copper-Catalyzed Propargylation
Zhu, Qiongqiong,Meng, Beibei,Gu, Congzheng,Xu, Ye,Chen, Jie,Lei, Chuanhu,Wu, Xiaoyu
, p. 9985 - 9989 (2019)
A diastereo- and enantioselective propargylic substitution reaction between propargylic carbonates and α-substituted nitroacetates catalyzed by a Cu-pybox complex is described. This method allows the preparation of a series of non-proteinogenic quaternary α-amino acid precursors featuring two contiguous stereogenic centers and a terminal alkyne moiety in high yields with good to excellent diastereo- and enantioselectivities in most cases. The propargylated adducts were elaborated into a diverse set of quaternary α-amino acid derivatives.
Stereoselective dehydrobromination of alkyl α-Br α-Cl-carboxylates
Forti, Luca
, p. 3023 - 3026 (2007/10/02)
(Z)-Alkyl α-Cl-α,β-unsaturated esters are prepared in excellent yields by stereoselective dehydrobromination of alkyl α-Br-α-Cl-carboxylates with LiCl-Li2CO3 in dimethylformamide.
SOLVOLYSIS OF 1-CHLORO-1-ALKENYL PHENYL SULFIDES. SYNTHESIS OF α-BROMO PHENYL THIOCARBOXYLIC ESTERS, α-BROMO ALKYL CARBOXYLIC ESTERS AND α-PHENYLTHIO METHYL CARBOXYLIC ESTERS
Fortes, C. C.,Chaves, M. H.
, p. 751 - 762 (2007/10/02)
1-Chloro-1-alkenyl phenyl sulfides treated with bromine followed by hydrolysis or methanolysis give α-bromo phenyl thiocarboxylic esters and α-phenylthio methyl carboxylic esters.Direct oxidative solvolysis with bromine and alcohol give α-bromo alkyl carboxylic esters.
