Ring contraction of 1,3-bis(5-bromopentyl)alloxazine
摘要:
The reaction of 1,3-bis(5-bromopentyl)alloxazine with ethylamine in propan-2-ol resulted in replacement of the terminal bromine atoms by ethylamino groups and was accompanied by contraction of the pyrimidine ring so that the products were 1,3-bis[5-(ethylamino)pentyl]alloxazine and 1,3-bis[5-(ethylamino)-pentyl]imidazo[4,5-b]quinoxalin-2-one.
An image-forming photo-sensitive material utilizing changes in adherence due to light, wherein an alloxazine derivative represented by the following formula (I), (wherein R's may be the same or different from each other and each represents an alkyl group containing 1 to 20 carbon atoms or a phenylalkyl group represented by the formula (II), (wherein n represents an integer of 1 or above)) is used as a photopolymerization initiator. In order to enable the photo- sensitive material to reproduce intermediate gradation of an image, the photo-sensitive material is provided with a composite structure wherein a photo-sensitive layer additionally containing a tertiary amine as a sensitizer is provided on a hardened layer formed by hardening a photo-sensitive composition. This photo-sensitive material can be used as a copying material for recording and reproducing a picture image from a cathode ray tube or a fiber tube.
Ring contraction of 1,3-bis(5-bromopentyl)alloxazine
作者:V. E. Semenov、R. Kh. Giniyatullin、D. R. Sharafutdinova、V. S. Reznik
DOI:10.1134/s1070428010030243
日期:2010.3
The reaction of 1,3-bis(5-bromopentyl)alloxazine with ethylamine in propan-2-ol resulted in replacement of the terminal bromine atoms by ethylamino groups and was accompanied by contraction of the pyrimidine ring so that the products were 1,3-bis[5-(ethylamino)pentyl]alloxazine and 1,3-bis[5-(ethylamino)-pentyl]imidazo[4,5-b]quinoxalin-2-one.