Site-selective C–H bond carbonylation with CO<sub>2</sub> and cobalt-catalysis
作者:Nagaraju Barsu、Deepti Kalsi、Basker Sundararaju
DOI:10.1039/c8cy02060d
日期:——
in situ-produced CO gas for C–Hbondcarbonylation using earth-abundant cobalt catalysts. The ease of handling CO2 gas at atmospheric pressure allows us to prepare 13C labelled compounds which are otherwise difficult to achieve. The procedure developed makes it possible to utilize CO2 as a CO source, which can be widely applied as a C1 synthon that can be incorporated between C–H and N–H bonds of aromatic
A general efficient regioselective cobaltcatalyzedcarbonylation of unactivated C(sp3)–H bonds of aliphatic amides was demonstrated using atmospheric (1–2 atm) carbon monoxide as a C1 source. This straightforward approach provides access to α-spiral succinimide regioselectively in a good yield. Cobaltcatalyzed sp3 C–H bond carbonylation is reported for the first time including the functionalization
Cobalt-Catalyzed Intramolecular Oxidative C(sp<sup>3</sup>)–H/N–H Carbonylation of Aliphatic Amides
作者:Li Zeng、Shan Tang、Dan Wang、Yi Deng、Jeng-Lung Chen、Jyh-Fu Lee、Aiwen Lei
DOI:10.1021/acs.orglett.7b00825
日期:2017.4.21
reaction protocol is developed to achieve the intramolecular oxidative C(sp3)–H/N–H carbonylation of aliphaticamides with CO. Various substituted propanamides are selectively transformed into corresponding succinimides in good to high yields. Notably, predominant selectivity for the carbonylation at the α-methyl groups of linear aliphaticamides is observed in this reaction system.
A heterocyclic compound and its synthesis, pharmaceutical formulations thereof and the use of the compounds and the formulations in medicine
申请人:THE WELLCOME FOUNDATION LIMITED
公开号:EP0030023A2
公开(公告)日:1981-06-10
The compound offormula (I)
and acid addition salts thereof are of value in medicine in the treatment or prophylaxis of pain, inflammation or fever. The compound and its salts may be administered alone or as a pharmaceutical formulation. The compound may be prepared by methods analogous to those known in the art or, for example, by cyclisation of a 4-halo-N- (B-quinolyl)butyramide in the presence of aqueous sodium hydroxide and a phase transfer catalyst such as triethylbenzyl ammonium chloride.