## Abstract The novel title heterocyclic scaffold is prepared efficiently from N‐substituted pyrimidinediamines and aldehydes.
Synthesis of novel tricyclic 4-chloro-7,8,10,11-tetrahydro-5H-benzo[e]pyrimido[4,5-b][1,4]diazepin-9(6H)-ones
✍ Scribed by Jinbao Xiang; Lianyou Zheng; Tong Zhu; Qun Dang; Xu Bai
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2010
- Tongue
- English
- Weight
- 126 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0022-152X
- DOI
- 10.1002/jhet.384
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✦ Synopsis
Abstract
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A series of tricyclic 7,8,10,11‐tetrahydro‐5__H__‐benzo[e]pyrimido[4,5‐b][1,4]diazepin‐9(6__H__)‐ones were prepared in moderate to high yields using TFA‐promoted iminium‐cyclization reactions of 3‐(6‐(butylamino)‐4‐chloropyrimidin‐5‐ylamino)cyclohex‐2‐enones and various aldehydes. J. Heterocyclic Chem., (2010).
📜 SIMILAR VOLUMES
## Abstract A new method was developed for the synthesis of 6,7‐dihydro‐5__H__‐pyrimido[4,5‐__e__][1,4]diazepin‐8(9__H__)‐one derivatives. The key to construct the pyrimido[4,5‐__e__][1,4]diazepine core is the intramolecular amidation of __N__‐((4‐amino‐6‐chloropyrimidin‐5‐yl)methyl)‐substituted am
## Abstract Reaction of 5‐amino‐3‐methyl‐1‐phenylpyrazole (1a) and 5‐amino‐3‐(4‐chlorophenyl)‐1__H__‐pyrazole (1b) with dimedone (2) and __p__‐susbstituted benzaldehydes 3 in ethanol, afforded in all cases tricyclic linear 4‐aryl‐7,7‐dimethyl‐4,7,8,9‐tetrahydro‐6__H__‐pyrazolo[3,4‐__b__]quinolin‐5‐