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2004
Fused pyrimidine derivatives
R 0515
Heterocyclization of Functionalized Heterocumulenes with C,N- and
Part 1. Cyclocondensation of 1-Chloroalkylheterocumulenes
48- 134 C,O-Binucleophiles.
and N-(1-Chloroalkylidene)urethanes with 2-Cyanomethylpyridine. — The reaction of 2-cyanomethylpyridine (I) with 1-chloroalkyl isocyanates (II), 1-chloroalkylcarbodiimides (V), 1,1-dichloroalkyl isocyanates (VII) as well as N-(1-chloroethylidene)-O-methylurethanes such as (IX) results in the formation of cyclization products
having a pyrido[1,2-c]pyrimidine structure. — (VOVK, M. V.; LEBED, P. S.;
CHERNEGA, A. N.; PIROZHENKO, V. V.; BOIKO, V. I.; TSYMBAL, I. F.; Chem.
Heterocycl. Compd. (N. Y.) 40 (2004) 1, 47-57; Inst. Org. Chem., Acad. Sci. Ukr.,
Kiev 253094, Ukraine; Eng.) — R. Staver
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