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2.3- Dichloro-5,8-dimethoxyquinoxaline with thiourea

The isothiazolo[4,5-6 4, 5 -e]pyrazine system 51 has been obtained by cyclizing the isothiazole 50 <97MC97> and the reaction of 2,3-dichloro-5,8-dimethoxyquinoxaline with thiourea yields the pentacyclic system 52 <96JCS(P1)2443>. [Pg.283]

Dichloro-5,8-dimethoxyquinoxalme reacted abnormally with thiourea to give a separable mixture of bis(3-chloro-5,8-dimethoxyquinoxalin-2-yl) sulfide (164) and 1,4,8,ll-tetramethoxy-[l,4]dithiino[2,3- 5,6- ]diquinoxaline (165) [H2NCSNH2 (1 equiv), Et N, Me2NCHO, reflux, 5 h 23% and 52%, respect vely]. analogs likewise " ... [Pg.164]


See also in sourсe #XX -- [ Pg.164 ]

See also in sourсe #XX -- [ Pg.164 ]




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With thiourea

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