Reaction of 2,3-tetramethylen-3,4-dihydroquinazol-4-one and its derivatives with aromatic aldehydes and furfurol
作者:A. Sh. Abdurazakov、B. Zh. Elmuradov、Zh. E. Turdibaev、Kh. M. Shakhidoyatov
DOI:10.1007/s10600-009-9334-x
日期:2009.5
α-Aryliden-6H(nitro)- and 6,8-dibromo-2,3-tetramethylen-3,4-dihydroquinazol-4-ones were synthesized by condensation of 6H(nitro)- and 6,8-dibromo-2,3-tetramethylen-3,4-dihydroquinazol-4-ones with aromatic aldehydes, furfurol, and of α-formyl-2,3-tetramethylen-3,4-dihydroquinazol-4-one with benzaldehyde and 4-nitrobenzaldehyde in glacial acetic acid.
Selective copper(II) acetate and potassium iodide catalyzed oxidation of aminals to dihydroquinazoline and quinazolinone alkaloids
作者:Matthew T Richers、Chenfei Zhao、Daniel Seidel
DOI:10.3762/bjoc.9.135
日期:——
acetate/acetic acid/O2 and potassium iodide/tert-butylhydroperoxide systems are shown to affect the selective oxidation of ring-fused aminals to dihydroquinazolines and quinazolinones, respectively. These methods enable the facile preparation of a number of quinazoline alkaloid natural products and their analogues.