3.4- Dihydro-2//-pyrido pyrimidines basicity

Oxo-3,4-dihydro-2//-pyrido[l,2-a]pyrimidines are neutral or slightly basic acid binders in the preparation of esters, amides, lactones, ethers, and amines.460-465... 

The basicity of 3,4-dihydro-2//-pyrido[ 1,2-[Pg.106]

JA11707), 4-cyano-3-phenyl-3-trifluoromethyl-2,3-dihydro-lH-pyrido [l,2-c]pyrimidin-l-one (05MI1), and 10-(ferf-butyl)-3-methylene-3,4,4fl,5-tetrahydro-3H-[l,3]oxazino[3,4-b]isoquinolin-l-one (07EJ02015) under either acidic or basic conditions. 

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