Ex 5: The Grignard reaction between para-chlorophenylmagnesium bromide and 1-cyanoisoquinoline [1198-30-7] (1) gave 1-(4-chlorobenzoyl)isoquinoline, PC12243105 (2). The reaction of this with O-tosylhydroxylamine [52913-14-1] gives (2-aminoisoquinolin-2-ium-1-yl)-(4-chlorophenyl)methanone;4-methylbenzenesulfonate, PC23311140 (3). The reaction of this a mixture of formamide and phosphoryl chloride gave the ring. The addition of perchloric acid led to 1-(4-Chlorophenyl)[1,2,4]triazino[6,1-a]isoquinolin-5-ium perchlorate [82319-70-8] (4). The reaction of this with triethylammonium bromide is said to give (4).
Ex 1: 1-(4-chlorophenyl)-as-triazino[6,1-a]isoquinolinium-bromide [82319-85-5] (1) is reacted with an aqueous solution of acetonitrile to give the title compound.
Ex 2: Treatment with ethanesulfonic acid in acetonitrile then prepares the esilate salt.
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^DE3128386 idem Sandor Batori, 8 More », US4419355 (1983 to Egyt Gyogyszervegyeszeti Gyar).
^Hungarian Patent application Ser. No. 3243/83. idem Andras Messmer, 7 More », US4753938 (1988 to Richter Gedeon Vegyeszeti Gyar Rt.).
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