期刊
CHEMICAL COMMUNICATIONS
卷 58, 期 39, 页码 5853-5856出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc01067d
关键词
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资金
- DST, New Delhi [CRG/2018/002120/OC]
- IIT Guwahati
An unprecedented metal-free and catalyst-free synthesis method for synthesizing benzo[c]chromeno[4,3,2-gh]phenanthridine derivatives is reported for the first time. The remote cyclization and aromatization reactions are achieved through a series of reaction steps. A DMSO-assisted synthesis method is also disclosed for the first time.
An unprecedented metal-free and catalyst-free synthesis of benzo[c]chromeno[4,3,2-gh]phenanthridine derivatives, a class of 1,6-diheterophenalenoid heterocycle, is reported for the first time. The oxidative cross-coupling reaction for the remote cyclization is achieved through the in situ generated o-quinone methide intermediate followed by an electrocyclic ring closure reaction. The aromatization of the cyclohexane ring is achieved by sequential H shift, hydroxylation, and elimination reaction. DMSO-assisted concomitant cyclization and aromatization reactions are also disclosed for the first time.
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