Preparation method of polysubstituted pyrrole compound
The invention discloses a preparation method of a polysubstituted pyrrole compound of 1-benzyl-2-amino-3-cyan pyrrole derivative. Malononitrile, benzaldehyde and aminoacetaldehyde dimethanol are usedas starting raw materials to prepare a target product through reductive amination, loop closing and amino derivatization. The compound has potential bioactivity.
-
Paragraph 0027; 0028
(2018/03/24)
Facile synthesis of 1-substituted 2-amino-3-cyanopyrroles: New synthetic precursors for 5,6-unsubstituted pyrrolo[2,3-d]pyrimidines
(Equation Presented) 1-Benzyl-3-cyanopyrrole-2-carbonyl azide (5) underwent a Curtius rearrangement followed by quenching with alcohols to form the corresponding carbamates (6a-c). The carbamates 6a,b were unblocked to give the desired 2-amino-1-benzyl-3-cyanopyrrole (1a). A more facile procedure was subsequently developed for the synthesis of 1-substituted 2-amino-3- cyanopyrroles. N-Substituted aminoacetaldehyde dimethyl acetals (7a-c) were condensed with malononitrile in the presence of p-toluenesulfonic acid monohydrate to afford the corresponding 1-substituted 2-amino-3-cyanopyrroles (1a-c).
Chien, Tun-Cheng,Meade, Eric A.,Hinkley, Jack M.,Townsend, Leroy B.
p. 2857 - 2859
(2007/10/03)
More Articles about upstream products of 753478-33-0