Reaction of β-Nitro Enamines with Isocyanates, Isothiocyanates and Dimethyl Acetylenedicarboxylate
作者:Takao Tokumitsu
DOI:10.1246/bcsj.59.3871
日期:1986.12
β-Nitro enamines (1) reacted with isocyanates and isothiocyanates to give β-(substituted carbamoyl) and β-(substituted thiocarbamoyl) β-nitro enamines, respectively. The reaction of 1 with benzoyl isothiocyanate gave β-(benzoylthiocarbamoyl) β-nitro enamines (8) and/or a mixture of 8 and 4(1H)-pyrimidinethione derivatives (9) which were cyclization products of 8. The isolated 8 afforded the corresponding
Spectral properties and isomerism of nitroenamines. Part 3
作者:Jose Luis Chiara、Antonio Gómez-Sánchez、Juana Bellanato
DOI:10.1039/p29920000787
日期:——
complete and fairly accurate quantitative picture of the isomerism affecting the nitroenamines R2R3N–C(1)R1C(2)H–NO2(R1= H, Me). The compounds with primary or secondary amino groups (R2 and/or R3= H) exist as solvent-dependent equilibrium mixtures of the intramolecularly hydrogen-bonded Z-form and the E-form; the latter isomer can adopt the Z and/or the Econformation around the C(1)–N single bond when R2≠