Synthesis of Linear Aza and Thio Analogues of Acetogenins and Evaluation of Their Cytotoxicity
作者:Piret Villo、Lauri Toom、Elo Eriste、Lauri Vares
DOI:10.1002/ejoc.201300767
日期:2013.10
Four aza and two thioanalogues of Annonaceous acetogenins were synthesized according to a general synthetic route. Two remote stereocentres in the analogues were set with high enantio‐ and diastereoselectivity in one step by hydrolytic kinetic resolution of a terminal bis‐epoxide.
An NMR and MD Modeling Insight into Nucleation of 1,2-Alkanediols: Selective Crystallization of Lipase-Catalytically Resolved Enantiomers from the Reaction Mixtures
The work on developing a scalable lipase-catalytic method for the kinetic resolution of long-chain 1,2-alkanediols, complemented by crystallization of the pure enantiomers from the reaction mixtures, offered the possibility of a more detailed study of the aggregation of such diols. MD modeling, mass spectrometry, H-1 NMR, and DOSY studies provided a novel insight into the nucleation process. An efficient protocol for stereo- and chemoselective crystallization of (S)-1,2-dodecanediol and related compounds from the crude bioconversion mixtures was developed.
An efficient and general approach for the synthesis of amphiphilic 1,2-amino alcohols is reported. The use of N-benzyl protecting groups is essential for obtaining good yields when opening a long-chain terminal epoxide with an amine.
CHEN, CHING-SHIH;LIU, YEUK-CHUEN, TETRAHEDRON LETT., 30,(1989) N1, C. 7165-7168