Irreversible Conjugation of Aldehydes in Water To Form Stable 1,2,4-Oxadiazinan-5-ones
作者:Alexandre F. Trindade、Jeffrey W. Bode
DOI:10.1021/acs.orglett.6b01889
日期:2016.9.2
A new, irreversible aldehyde conjugation reaction in aqueous media was developed. α-Aminooxy acetohydrazides undergo irreversible condensation reactions with aliphatic, aromatic, or unsaturated aldehydes and isatins in a mixture of acetonitrile and acetate buffer at pH 4 to yield 1,2,4-oxadiazinan-5-one heterocycles in excellent isolated yields (40–99%). This class of heterocycles proved to be hydrolytically
Cornforth et al., Biochemical Journal, 1951, vol. 48, p. 591,595
作者:Cornforth et al.
DOI:——
日期:——
Palazzo; Rosnati, Gazzetta Chimica Italiana, 1953, vol. 83, p. 211,221
作者:Palazzo、Rosnati
DOI:——
日期:——
Intramolecular H-Bonds in an Organocatalyst Enabled an Asymmetric Michael/Alkylation Cascade Reaction to Construct Spirooxindoles Incorporating a Densely Substituted Cyclopropane Motif
A cascadeMichael addition/alkylationreaction between 3-chlorooxindoles and α-cyano chalcones catalyzed using a multifunctional quinine-derived aminoindanol-thiourea substance was investigated. A series of spirooxindoles incorporating a densely substituted cyclopropane motif were efficiently obtained with moderate to excellent diastereo- and enantioselectivity and further transformed to products with