Stereochemistry, tautomerism, and reactions of acridinyl thiosemicarbazides in the synthesis of 1,3-thiazolidines
作者:Eva Balentová、Ján Imrich、Juraj Bernáat、Lucia Suchá、Mária Vilková、Pavol Kristian、Kalevi Pihlaja、Karel D. Klika、Nad'a Pröanayová
DOI:10.1002/jhet.5570430318
日期:2006.5
Acridin-9-yl hydrazine upon treatment with various isothiocyanates (RNCS, R = methyl, allyl, phenyl, p-methoxy phenyl, and p-nitro phenyl) yielded the corresponding thiosemicarbazides with acridine substituted on the carbazide-type side. The alkyl-substituted compounds were present in solution as equilibria consisting of the major H-10, H-12 tautomer (either E or Z or both about the C13-N14 bond) and
用各种异硫氰酸酯(RNCS,R =甲基,烯丙基,苯基,对-甲氧基苯基和对-硝基苯基)处理后的Acridin-9-基肼产生了相应的硫代氨基脲,在a环类型的一面上取代了cr啶。烷基取代的化合物以主要的H-10,H-12互变异构体(E或Z或两者均与C 13 -N 14键有关)和次要的H-10,SH互变异构体(其中一个为平衡)形式存在于溶液中。E或Z或两者)。芳族取代化合物的主要种类是H-10,H-12 E互变异构体,明显的次要种类是H-10,H-12 Z互变异构体。在用亚甲基腈氧化物处理后,将每一种硫代氨基脲均定量地转化成类似的氨基脲,其中所有结构均以具有关于C 13 -N 14键的Z构象的H-10互变异构体的形式存在于溶液中。所述化合物与碘甲烷的甲基化产生S-甲基化的化合物,其中Z构型在每种情况下均沿N 12 -C 13双键在E构型上占优势。用溴乙酸甲酯处理硫代氨基脲会形成1',3'-噻唑烷定