Studies on isoxazoles. XIII. Synthesis and chemical properties of 3-mercaptoisoxazoles.
作者:SOJI SUGAI、KAZUO TOMITA
DOI:10.1248/cpb.28.552
日期:——
3-Mercaptoisoxazoles (XI) were synthesized from 3-allylsulfinylisoxazoles (II). The reaction of II with triphenylphosphine in the presence of acetic anhydride gave the corresponding 3-acetylthioisoxazoles (VII). The thioacetates (VII) were converted into 3-mercaptoisoxazoles (XI) by reaction with silver nitrate and subsequent treatment of the resulting silver salts (X) with hydrogen sulfide. The thiols (XI) were oxidized in air to give the corresponding disulfides (XIV). In alkaline solution, 3-mercapto-5-phenylisoxazole (XIb) was decomposed into benzoylacetonitrile (IX) and sulfur.
Tomita,K. et al., Chemical and pharmaceutical bulletin, 1979, vol. 27, p. 2415 - 2423
作者:Tomita,K. et al.
DOI:——
日期:——
Divergent Reactivity in the Reaction of β-Oxodithioesters and Hydroxylamine: Access to β-Ketonitriles and Isoxazoles
作者:Jiaheng Li、Wei Ma、Wenbo Ming、Cong Xu、Na Wei、Mang Wang
DOI:10.1021/acs.joc.5b01869
日期:2015.11.6
Starting from beta-oxodithioesters and hydroxylamine, two completely different transformations afford either beta-ketonitriles or isoxazoles with high chemoselectivity depending on the reaction conditions. The reaction of beta-oxodithioesters with hydroxylamine in EtOH at room temperature in daylight gave beta-ketonitriles in high yields. On the other hand, 3-methylthio-isoxazoles were efficiently obtained as the final products by heating the mixture of beta-oxodithioesters and hydroxylamine in HOAc at 90 degrees C.
TOMITA K.; SUGAI S.; SAITO M., CHEM. AND PHARM. BULL., 1979, 27, NO 10, 2415-2423
作者:TOMITA K.、 SUGAI S.、 SAITO M.
DOI:——
日期:——
SUGAI S.; TOMITA K., CHEM. AND PHARM. BULL., 1980, 28, NO 2, 552-557