Syntheses of Functionalized Pyrimidines from the Products of Addition of Triphenylphosphoranylideneacetonitrile to Acyl Isothiocyanates
摘要:
The products of addition of accessible phosphorus-containing ylide Ph3P-CHCN to acyl and alkoxycarbonyl isocyanates readily cyclize under the action of methanolic HCl. This reaction was used for preparing a broad range of new 5-phosphonium derivatives of di- and trifunctionalized pyrimidine bases. Among them, the corresponding tertiary phosphonium salts containing no labile hydrogen atoms are especially important. Under mild conditions, they undergo dephosphorylation in the presence of alkalis to give 4-mercapto, 4,6-dimercapto-, and 2,4,6-trimercaptopyrimidine derivatives which are difficult or impossible to prepare by traditional routes.
A challenging synthetic approach to phosphonium ylide-betaines of the pyrimidine series
作者:Luc Van Meervelt、Oleg B. Smolii、Nikolai I. Mishchenko、Dmitrii B. Shakhnin、Evgenii A. Romanenko、Boris S. Drach
DOI:10.1016/0040-4020(96)00425-5
日期:1996.6
several types of phosphoniumylide-betaines of the pyrimidineseries, the structure of which was established by chemical transformations and X-ray diffraction analysis. Despite the mesomeric character of these heterocyclic nucleophilic agents, they are alkylated in a regioselective manner, which proves this approach to be important for the synthesis of non-phosphorylated pyrimidine derivatives, which
Smolii, O. B.; Panchishin, S. Ya.; Drach, B. S., Russian Journal of General Chemistry, 1993, vol. 63, # 9.1, p. 1390 - 1393
作者:Smolii, O. B.、Panchishin, S. Ya.、Drach, B. S.
DOI:——
日期:——
Syntheses of Functionalized Pyrimidines from the Products of Addition of Triphenylphosphoranylideneacetonitrile to Acyl Isothiocyanates
作者:L. V. Muzychka、O. B. Smolii、B. S. Drach
DOI:10.1023/b:rugc.0000045875.40116.eb
日期:2004.7
The products of addition of accessible phosphorus-containing ylide Ph3P-CHCN to acyl and alkoxycarbonyl isocyanates readily cyclize under the action of methanolic HCl. This reaction was used for preparing a broad range of new 5-phosphonium derivatives of di- and trifunctionalized pyrimidine bases. Among them, the corresponding tertiary phosphonium salts containing no labile hydrogen atoms are especially important. Under mild conditions, they undergo dephosphorylation in the presence of alkalis to give 4-mercapto, 4,6-dimercapto-, and 2,4,6-trimercaptopyrimidine derivatives which are difficult or impossible to prepare by traditional routes.