Lithiation and electrophilic substitution of 8-chlorodibenz[<i>b</i>,<i>f</i>][1,4]-oxazepine-10-<i>tert</i>-butylcarbamate: The preparation of novel fused heterocyclic derivatives of 8-chlorodibenzoxazepine
作者:James J. Li、R. Alan Chrusciel、Monica B. Norton、David B. Reitz、Timothy J. Hagen、Sofya Tsymbalov、E. Ann Hallinan
DOI:10.1002/jhet.5570310670
日期:1994.11
Lithiation of 8-chlorodibenz[b,f][1,4]oxazepine-10-tert-butylcarbamate (1) is described. Electrophilic substitution of the resulting N-Boc dibenzoxazepine α- lithioamine 2 with ketones, aldehydes, nitriles, iso-cyanates and imines, followed by an in-situ cyclization, gave fused carbamates 5–26, fused 2H-imidazol-2-ones 27–29, fused hydantoins 30–32, and fused ureas 33–35, respectively, in 11–66% yield
描述了8-氯二苯并[ b,f ] [1,4]氧杂氮杂-10-叔丁基氨基甲酸酯的锂化(1)。用酮,醛,腈,异氰酸酯和亚胺亲电取代所得的N -Boc二苯并氮杂卓α-硫代胺2,然后原位环化,得到稠合的氨基甲酸酯5–26,稠合的2 H-咪唑-2-酮。27-29,融合乙内酰脲30-32和融合尿素33-35,产率为11-66%。