Synthesis and<i>S</i>-methylation of 2-thioxopyrido[3′,2′:4,5]thieno[3,2-<i>d</i>]-pyrimidin-4(3<i>H</i>)-ones with and without a phase transfer catalyst
作者:Chaitanya G. Dave、A. B. Shah、H. C. Shah
DOI:10.1002/jhet.5570340335
日期:1997.5
number of 2-thioxopyrido[3′,2′:4,5]thieno[3,2-H]pyrimdin-4(3H-ones (5) have been synthesized by cyclocondensation of 2-carbethoxy-3-amino-4-phenyl-6-substituted-thieno[2,3-b]pyridines (3) with various isothiocyanates. Compounds 5 were S-methylated routinely and the reactions compared under solid-liquid phase transfer conditions to obtain 2-methylthiopyrido[3′,2′:4,5]thieno[3,2-d]pyrimidin-4(3H)-ones (6)
一些2- thioxopyrido的[3',2':4,5]噻吩并[3,2- ħ ] pyrimdin-4(3 ħ -酮(5)环化缩合已合成的2-乙氧羰基-3-氨基将4-苯基-6-取代的噻吩并[2,3- b ]吡啶(3)与各种异硫氰酸酯进行常规化合物S-甲基化,并在固-液相转移条件下比较反应,以获得2-甲基硫代吡啶并[3' ,2':4,5]噻吩并[3,2- d ]嘧啶-4(3 H ^) -那些。(6)新的三杂环pyridothienopyrimidines用目的制备以研究它们的药理学性质。