Mass spectra of 2,3-polymethylene-3,4-dihydroquinazolin-4-ones with substituents at C9 View Full Text


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Article Info

DATE

1979-03

AUTHORS

V. N. Plugar', Ya. V. Rashkes, Kh. M. Shakhidoyatov

ABSTRACT

The main fragments in the mass spectra of the 2,3-polymethylene-3,4-dihydroquinazolin-4-one with six- and seven-membered alicyclic rings are formed by the decomposition of ring C through the stage of the cleavage of the C9-C10 bond, while the compound with a five-membered ring ejects a hydrogen atom.A hydroxy group at C9 initiates the appearance of fragments due to the initial cleavage of the C2-C9 bond. In the spectra of the halogen and acetoxy derivatives the fragmentation of the alicyclic ring is suppressed and the main fragmentation pathway is the splitting out of the substituent. The hypothesis of the protonation of the N1 nitrogen atom has been adopted to explain the stability of a number of the ions. More... »

PAGES

152-157

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00570787

DOI

http://dx.doi.org/10.1007/bf00570787

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1042777925


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