Straightforward Novel One-Pot Enaminone and Pyrimidine Syntheses by Coupling-Addition-Cyclocondensation Sequences
作者:Thomas J. Müller、Alexei S. Karpov
DOI:10.1055/s-2003-42480
日期:——
The coupling of acid chlorides 1 with terminal alkynes 2using only one equivalent (!) of triethylamine under Sonogashira conditions followed by subsequent addition of primary or secondary amines 4 to the intermediate alkynones 3 represents a straightforward one-pot three component access to enaminones 5 undermildconditions and in excellent yields. Furthermore, 2,4-di- and 2,4,6-trisubstituted pyrimidines
Trisulfur-Radical-Anion-Triggered C(sp<sup>2</sup>)–H Amination of Electron-Deficient Alkenes
作者:Khang X. Nguyen、Phuc H. Pham、Thao T. Nguyen、Chou-Hsun Yang、Hoai T. B. Pham、Tung T. Nguyen、Haobin Wang、Nam T. S. Phan
DOI:10.1021/acs.orglett.0c03846
日期:2020.12.18
A trisulfur-radical-anion (S3̇–)-triggered C(sp2)–Hamination of α,β-unsaturated carbonyl derivatives with simple amines has been demonstrated. This protocol provides convenient access to a variety of synthetically valuable N-unprotected and secondary β-enaminones with absolute Z selectivity and tertiary β-enaminones with E selectivity. Mechanistic probe and electronic structure theory calculations
A novel synthesis of α- and β-morpholino enones by electron transfer sensitized photooxidation of 2-morpholinocyclopropanols
作者:Wilfried Weigel
DOI:10.1039/a704024e
日期:——
An electron transfer mechanism is proposed to account for the photooxidation of 2-morpholinocyclopropanols 1 to the amino enone derivatives 2 and 3 in the presence of 9,10-dicyanoanthracene or triphenylpyrylium tetrafluoroborate and triplet oxygen.