Tin(ii) chloride assisted synthesis of N-protected γ-amino β-keto esters through semipinacol rearrangement
作者:Anupam Bandyopadhyay、Neha Agrawal、Sachitanand M. Mali、Sandip V. Jadhav、Hosahudya N. Gopi
DOI:10.1039/c0ob00199f
日期:——
A facile synthetic route for the preparation of N-protected γ-amino β-keto esters from amino aldehydes and ethyl diazoacetate is described. The two component coupling is facilitated by tin(II) chloride followed by semipinacol rearrangement leading to the product in quantitative yield. The reaction is mild, instantaneous and compatible with Boc-, Fmoc- and Cbz-amino protecting groups.
Stereochemistry and total synthesis of janolusimide, a tripeptide marine toxin
作者:Assunta Giordano、Carmela Della Monica、Francesco Landi、Aldo Spinella、Guido Sodano
DOI:10.1016/s0040-4039(00)00533-5
日期:2000.5
The stereochemistry of janolusimide, a lipophilic tripeptide marine toxin, has been fully elucidated by stereoselective synthesis of the lactam component (5S)-3,3'-dimethyl-5-isopropylpyrrolidin-2,4-dione. The peptide was then synthesized in 13 steps and in 0.8% total yield. (C) 2000 Elsevier Science Ltd. All rights reserved.