LITHIATION AND ELECTROPHILIC SUBSTITUTION OF ODIBENZ[B,F][1,4]-OXAZEPINE-10-TERT-BUTYLCARBAMATE - THE PREPARATION OF NOVEL FUSED HETEROCYCLIC-DERIVATIVES OF 8-CHLORODIBENZOXAZEPINE
Jj. Li et al., LITHIATION AND ELECTROPHILIC SUBSTITUTION OF ODIBENZ[B,F][1,4]-OXAZEPINE-10-TERT-BUTYLCARBAMATE - THE PREPARATION OF NOVEL FUSED HETEROCYCLIC-DERIVATIVES OF 8-CHLORODIBENZOXAZEPINE, Journal of heterocyclic chemistry, 31(6), 1994, pp. 1689-1696
Lithiation of rodibenz[b,f][1,4]oxazepine-10-tert-butylcarbamate (1) i
s described. Electrophilic substitution of the resulting N-Boc dibenzo
xazepine alpha-lithioamine 2 with ketones, aldehydes, nitriles, isocya
nates and imines, followed by an in-situ cyclization, gave fused carba
mates 5-26, fused 2H-imidazol-2-ones 27-29, fused hydantoins 30-32, an
d fused ureas 33-35, respectively, in 11-66% yield.