Intramolecular ring closure of α,β-epoxy sulfoxides with hydroxyl group: A novel synthesis of 2-acyl cyclic ethers and 3-keto cyclic ethers
作者:Tsuyoshi Satoh、Ken-ichi Iwamoto、Koji Yamakawa
DOI:10.1016/s0040-4039(00)96159-8
日期:1987.1
Exo-trigonal-type intramolecular ring closure of the α,β-epoxy sulfoxides with hydroxylgroup gave 2-acyl cyclic ethers (5, 6, and 13 membered rings) in good yields. In contrast to this, endo-trigonal-type ring closure of the α,β-epoxy sulfoxides was rather difficult.
One-pot synthesis of 2-alkyltetrahydropyran-3-ones from 3-nitro-5,6-dihydro-4H-pyran and grignard reagents
作者:R. Menicagli、V. Guagnano、S. Samaritani
DOI:10.1016/0040-4039(95)02039-x
日期:1995.12
3-Nitro-5,6-dihydro-4H-pyran reacts with primary aliphatic and benzylic Grignard reagents and, in suitable hydrolysis conditions, gives the corresponding 2-alkyltetrahydropyran-3-ones in satisfactory yields.