Meb. Smith et al., Highly selective directed hydrogenation of enantiopure 4-(tert-butoxycarbonylamino)cyclopent-1-enecarboxylic acid methyl esters, TETRAHEDR L, 42(7), 2001, pp. 1347-1350
The use of both N-tert-butoxycarbonylamino- and hydroxyl-directed hydrogena
tion methodology to yield essentially single diastereomers of 3-(tert-butox
ycarbonylamino)-4-hydroxycyclopentanecarboxylic acid methyl esters and 3-(t
ert-butoxycarbonylamino)cyclopentanecarboxylic acid methyl esters is descri
bed. These results incorporate the first reported carbamate-directed hydrog
enations of functionalised cyclopentenes. (C) 2001 Published by Elsevier Sc
ience Ltd.