Iminium carbonic acid derivative salts.<b>XI</b>. Synthesis of<i>N,S</i>-containing heterobicycles from<i>N</i>-protected 2-methylthio-1,3-thiazinium and 2-methylthiothiazoüum salts. Part 3. Reaction of<i>N</i>-protected 2-methylthio-1,3-thiazinium and 2-methylthiothiazolium salts with 3-amino-2-cyano-3-arylacrylonitriles
作者:Wolfgang Hanefeld、Mahmoud Naeeni、Martin Schlitzer
DOI:10.1002/jhet.5570330657
日期:1996.11
N-Boc-protected 2-memylthio-1,3-thiazinium 1 and 2-methylthiothiazolium iodides 2, 3 obtained from the corresponding 3,4,5,6-tetrahydro-2H-1,3-thiazine-2-thiones and thiazolidine-2-thiones by the action of methyl iodide were reacted with 3-armno-2-cyano-3-arylacrylonitriles forming the cyclic isothioureas 5–7. The protection group was removed with trifluoroacetic acid whereupon the desired cyclisation
Ñ -Boc保护的2- memylthio -1,3-噻嗪1和2-methylthiothiazolium碘化物2,3从相应的3,4,5,6-四氢-2-获得ħ -1,3-噻嗪-2-硫酮和噻唑烷-2-硫酮在甲基碘的作用下与3-armno-2-cyano-3-芳基丙烯腈反应形成环状异硫脲5-7。用三氟乙酸除去保护基,然后将所需的环化成3,4-二氢-2 H,6 H-嘧啶基[ 2,1- b ] [1,3]噻嗪8a-c,8a'-c'和噻唑罗发生了[3,2- b ]嘧啶9a,b,9a′,b′,10a,b。