P. Imming, OMETHYL-5,5-DIMETHYL-1,3-THIAZOLIDINE-4-CARBOXYLIC ACID DIHYDROCHLORIDE - SYNTHESIS, EPIMERIZATION, AND DERIVATIVES, Archiv der pharmazie, 328(1), 1995, pp. 81-86
The preparation of the title compound 6a from penicillamine 5 or from
penicillins 7, the spectroscopic data and stereochemical assignments a
re given. 6a quickly epimerizes at C-2 in dilute aqueous solution. Det
ails are given along with the preparation of the new thiazolidines 10-
13 from 6.