Al. Stanley et Sp. Stanforth, REDUCTIVE CYCLIZATION OF 1-(2-NITROARYL)ISOQUINOLINE DERIVATIVES, Journal of heterocyclic chemistry, 31(6), 1994, pp. 1399-1400
Isoquinoline derivatives 3b and 3c were prepared and their triethyl ph
osphite mediated reductive cyclization reactions investigated. Only th
e indazolo[3,2-a]isoquinolines 4b and 4c were formed.