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Sergeev PG, Nenajdenko VG. Recent advances in the chemistry of pyridazine — an important representative of six-membered nitrogen heterocycles. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4922] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Li ZH, Jiang ZJ, Shao QL, Qin JJ, Shu QF, Lu WH, Su WK. One-Pot Cascade Heterocyclization of γ- and β-Ketomalononitriles to 2,4-Dichloro-Substituted Pyrano[2,3- d]pyrimidines and Furo[2,3- d]pyrimidines Mediated by Triphosgene and Triphenylphosphine Oxide. J Org Chem 2018; 83:6423-6431. [PMID: 29779383 DOI: 10.1021/acs.joc.8b00669] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A one-pot cascade heterocyclization strategy has been developed for the synthesis of 2,4-dichloro-substituted pyrano[2,3- d]pyrimidines and furo[2,3- d]pyrimidines from linear γ- and β-ketomalononitriles using triphosgene and triphenylphosphine oxide. The reaction afforded synthetic useful products with moderate to good yields, bypassing the conventional harsh conditions of chlorination. The mechanistic study revealed that the reaction proceeded with a non-isocyanate route, and the second step may conduct in a triphenylphosphine oxide-catalyzed manner.
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Affiliation(s)
- Zhen-Hua Li
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
| | - Zhi-Jiang Jiang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
| | - Qiao-Ling Shao
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
| | - Jin-Jing Qin
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
| | - Qiang-Feng Shu
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
| | - Wen-Hao Lu
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
| | - Wei-Ke Su
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals , Zhejiang University of Technology , Hangzhou 310014 , People's Republic of China
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