Palladium-catalyzed aerobic oxyarylthiolation of alkynone O-methyloximes with arylhydrazines and elemental sulfur. Issue 15 (25th March 2021)

• Record Type: Journal Article
• Authors: Li, Jianxiao; Lin, Zidong; He, Dan; Lin, Zhicong; Zheng, Zhixiang; Bi, Chunhui; Wu, Wanqing; Jiang, Huanfeng
• Is Part Of: Organic & biomolecular chemistry. Volume 19:Issue 15(2021)
• Page Start: 3396
• Page End: 3403
• Publication Date: 2021-03-25
• Subjects: Chemistry, Organic -- Periodicals; Bioorganic chemistry -- Periodicals; Chemistry, Physical organic -- Periodicals; 547
• DOI: 10.1039/d1ob00388g
• Languages: English
• ISSNs: 1477-0520

Abstract

Abstract : A novel and practical palladium-catalyzed aerobic oxyarylthiolation of alkynone O -methyloximes for the assembly of 4-sulfenylisoxazole derivatives is accomplished. Abstract : A novel and practical palladium-catalyzed aerobic oxyarylthiolation of alkynone O -methyloximes for the assembly of 4-sulfenylisoxazole derivatives using S8 and arylhydrazines as the S -aryl sources is accomplished. In the presence of 0.1 mol% of IPr–Pd–allyl–Cl as the catalyst and O2 (1 atm) as the sole oxidant, both alkynone O -methyloximes and arylhydrazines are suitable substrates, delivering diverse 4-sulfenyl isoxazoles in moderate to good yields with good functional group tolerance. Notably, the phenyl diazonium salt and sodium phenyl sulfinate are also suitable arylation reagents, providing an alternative synthetic strategy to access structurally diverse 4-sulfenyl isoxazoles.