Vy. Vvedensky et al., 1-METHYL-1H-2-PYRROLETHIOL AND 1-METHYL-1H-2-SELENOL - SYNTHESIS, TAUTOMERISM AND AUTOTRANSFORMATIONS, Tetrahedron, 53(49), 1997, pp. 16783-16788
Previously unknown 1-methyl-1H-2-pyrrolethiol and -selenol existing in
solutions as equilibrium tautomeric mixtures with their thione (selon
e) forms have been synthesized. The reason for instability of the comp
ounds was found to be their spontaneous dimerisation into 2-thio(selen
o)lactams. (C) 1997 Elsevier Science Ltd.