Studies on pyrimidine derivatives. XXXIX. Site-selectivity in the reaction of 5-substituted and 4, 5-disubstituted pyrimidine N-oxides with trimethylsilyl cyanide.

~47%

~72%

~%

~%

~24%

~%

~44%

~0%

~0%

~%

~%

~42%

~%

~%

~21%

~12%

~%

~%

~49%