for the following products
tert-Butyl 2,4-dichloro-5,6,8,9-tetrahydropyrimido[4,5-d]azepine-7-carboxylate | tert-Butyl 2,4-dichloro-8,9-dihydro-5H-pyrimido[4,5-d]azepine-7(6H)-carboxylate and 2,4-Dichloro-5,6,8,9-tetrahydropyrimido[4,5-d]azepine-7-carboxylic acid tert-butyl ester
