α-Bromo-steroidal ketones were converted into α-keto spiro-thiazolidine derivatives with β-aminothiols (H2N(CH2)2SH, o-H2NC6H4SH), in pyridine solution at room temperature.
Dave, Vinod; Stothers, J. B.; Warnhoff, E. W., Canadian Journal of Chemistry, 1980, vol. 58, p. 2666 - 2678
作者:Dave, Vinod、Stothers, J. B.、Warnhoff, E. W.
DOI:——
日期:——
Takahashi, Thomas T.; Satoh, James Y., Journal of the Chemical Society. Perkin transactions I, 1980, p. 1916 - 1919
作者:Takahashi, Thomas T.、Satoh, James Y.
DOI:——
日期:——
Reaction of α-halo ketone with 2-aminothiol: a new synthesis of thiazolidines with the oxo group migrated to the original position occupied by halogen atom
作者:Masatoshi Matsushita、T. Tomoyoshi Takahashi、Takamitsu Utsukihara、Yohei Shimizu、Rob J. Jansen、C. Akira Horiuchi
DOI:10.1016/j.tet.2007.06.041
日期:2007.9
The reaction of 2-bromo-3-oxo steroids with 2-aminoethanethiol led to the stereoselective formation of spiro[ steroid-3,2'-thiazolidin]2- ones as the major product. With both cyclic and acyclic alpha-halo alkanones, the reaction gave the thiazolidines with the oxo group migrated to the original position occupied by the halogen atom. In addition, it was found that the use of microwaves affords improvement of yields and shortening the reaction time in comparison with usual conditions. (C) 2007 Elsevier Ltd. All rights reserved.
.alpha.-Halo ketones. 10. Regiospecific homologation of unsymmetrical ketones