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Phthal azines

Although early investigators considered that 4-hydroxy-l-methyl-phthalazine existed as such in neutral solution, they refer to basicity data which, in the light of present knowledge, would lead to assignment of the l-methylphthalazin-4-one structure (84, R = Me) to the predominant tautomer. The correctness of the oxo structure for phthal-azin-l-one (84, R — H) has been demonstrated using infrared spectroscopy. ... [Pg.366]

T etrazo lo-1,2- azido-4- phthal azine-1,2-dihydride. See (1 -Azidophthalazine-4 , 5 )-5,l-tetrazole A641-R... [Pg.691]

Compound (227) <87JCS(P1)2517> and the pyridazino[6,l-c][l,4]benzoxazine (231) <9lMIP9ll7983> were synthesized in a similar fashion. Compounds (244), representatives of [l,3]oxazino[4,3-a]phthal-azines, were synthesized by 1 2 cycloaddition of (243) and dimethylketene (Equation (68)) <70JCS(C)1651>. [Pg.669]

CJEI,N 0, 1.4-Diozo. 1.2.3.4-tetrahydro.phthal> azin.carboiu4ure-(5)-azid 85 1 591. [Pg.286]

Phtal-. phthal-, phthalo-, phthalic. -amid-saure,-aminsaure,/. phthalamic acid, -azin,... [Pg.340]

See other pages where Phthal azines is mentioned: [Pg.17]    [Pg.192]    [Pg.192]    [Pg.17]    [Pg.192]    [Pg.192]   


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