Synthesis of 2,6-epithio-3-benzazocine derivatives.
作者:Mikio HORI、Tadashi KATAOKA、Hiroshi SHIMIZU、Eiji IMAI、Tokuo KOIDE、Noriyuki IWATA、Masayasu KURONO
DOI:10.1248/cpb.38.8
日期:——
2, 6-Epithio-3-benzazocines (9-thiabenzomorphans) in which the carbon atom at the 11-position is replaced by a sulfur atom, were synthesized by treatment of 1-(2-ethoxycarbonylaminoethyl)isothiochroman asulfoxides (16) with acetic anhydride or by heating 3-acetoxyisothiochromans (17) in Dowtherm A.The hetero-acetal moiety of this novel heterocycle (15) was stable to lithium aluminum hydride and boron tribromide. Reduction of 15 with lithium aluminum hydride gave the N-methyl derivative (19) and demethylation of the 8-methoxy derivative (19b) with boron tribromide gave the 8-hydroxy derivative (20).
2, 6-硫代-3-苯并唑啉(9-硫代苯吗啡)中,11位的碳原子被硫原子替代。其合成通过将1-(2-乙氧羰基氨基乙基)异硫烷(16)与醋酸酐反应或加热3-乙酰氧基异硫烷(17)于Dowtherm A进行。该新颖杂环(15)的杂醛部分对锂铝氢化物和三溴化硼稳定。用锂铝氢化物还原15得到N-甲基衍生物(19),而用三溴化硼去甲基化8-甲氧基衍生物(19b)则得到8-羟基衍生物(20)。