1-甲基-2- nitromethylenepyrrolidine的在碱的存在下arylisothiocyanates发现反应在3-СН进行2组的nitroenamine的随后进一步环化,得到4--R亚氨基-1-甲基-1, 2,3,4-四氢-6 H-噻吩并[3,4- b ]吡咯-6-一肟。在类似条件下,将烷基异硫氰酸酯加到1-甲基-2-硝基亚甲基吡咯烷中,得到1-甲基-2-硝基亚甲基吡咯烷-3-碳硫代酰胺,并且未观察到环化。提出了形成噻吩并[3,4- b ]吡咯衍生物的尝试性机理。
The reaction of 1-methyl-2-nitromethylenepyrrolidine with arylisothiocyanates in the presence of a base was found to proceed at the 3-СН2 group of the nitroenamine followed by further cyclization to afford 4-R-imino-1-methyl-1,2,3,4-tetrahydro-6H-thieno[3,4-b]pyrrol-6-one oximes. Under analogous conditions, alkylisothiocyanates add to 1-methyl-2-nitromethylenepyrrolidine giving 1-methyl-2-nitromet
1-甲基-2- nitromethylenepyrrolidine的在碱的存在下arylisothiocyanates发现反应在3-СН进行2组的nitroenamine的随后进一步环化,得到4--R亚氨基-1-甲基-1, 2,3,4-四氢-6 H-噻吩并[3,4- b ]吡咯-6-一肟。在类似条件下,将烷基异硫氰酸酯加到1-甲基-2-硝基亚甲基吡咯烷中,得到1-甲基-2-硝基亚甲基吡咯烷-3-碳硫代酰胺,并且未观察到环化。提出了形成噻吩并[3,4- b ]吡咯衍生物的尝试性机理。
Methods for converting N-alkyl lactams to vinylogous urethanes and vinylogous amides via(methylthio)alkylideniminium salts