... R2 R4SH LiBr (20 mol%) toluene, 25 h 2a: PhSH 2b: p-MeC6H4SH 2c: EtSH 1 3 + This document was downloaded for personal use only. Unauthorized distribution is strictly prohibited. Page 2. 1582 F. Ono et al. LETTER Synlett 2001, No. 10, 1581–1583 ISSN 0936-5214 ...