γ,δ-Unsaturated β-Diketones by Acylation of Ketones
摘要:
[GRAPHICS]gamma,delta-Unsaturated beta-diketones have been prepared by the acylation of ketones with N-acylbenzotriazoles of various aliphatic and aromatic alpha,beta-unsaturated carboxylic acids.
Alkyl, Unsaturated, (Hetero)aryl, and N-Protected α-Amino Ketones by Acylation of Organometallic Reagents
作者:Alan R. Katritzky、Khanh N. B. Le、Levan Khelashvili、Prabhu P. Mohapatra
DOI:10.1021/jo0614801
日期:2006.12.1
Stable and easily accessible N-acylbenzotriazoles, derived from a variety of aliphatic, unsaturated, (hetero)aromatic, and N-protected α-amino carboxylicacids, were reacted with Grignard and heteroaryllithium reagents to afford corresponding ketones in good to excellent yields.
Preparation and Synthetic Applications of N-(α,β-Unsaturated Acyl)-α-amino Acid Derivatives
作者:Alan R. Katritzky、Reena Gyanda、Nabin K. Meher、Yuming Song
DOI:10.3987/com-08-s(f)109
日期:——
N-(alpha,beta-Unsaturated acyl)-alpha-amino acids, amides and esters are structural motifs of many biologically active natural products. An alternate and advantageous approach for the synthesis of N-(alpha,beta-unsaturated acyl)-alpha-amino acid derivatives is developed via acylation of unprotected alpha-amino acids with stable crystalline N-(alpha,beta-unsaturated acyl)benzotriazole. The proposed methodology provides a new synthesis for compound (9) which is a precursor to a novel cytotoxic agent.