Practical Preparation of <i>Z</i>‐α‐(<i>N</i>‐Acetylamino)‐ and <i>Z</i>‐α‐(<i>N</i>‐Benzoylamino)‐α,β‐unsaturated Acids
作者:Branko S. Jursic、Sarada Sagiraju、Dustin K. Ancalade、Traneil Clark、Edwin D. Stevens
DOI:10.1080/00397910701265895
日期:2007.5.1
An efficient two‐step synthetic procedure for the preparation of numerous variations of N‐protected α,β‐unsaturated α‐amino acids and their corresponding esters from N‐protected glycine and either aliphatic or aromatic aldehydes was developed. The reaction involved cyclization of the N‐protected glycine into oxazolone, condensation with the aldehyde, and ring opening with a base.
摘要 开发了一种有效的两步合成程序,用于从 N-保护的甘氨酸和脂肪族或芳香族醛制备 N-保护的 α,β-不饱和 α-氨基酸及其相应的酯的多种变体。该反应包括将 N 保护的甘氨酸环化为恶唑酮、与醛缩合以及与碱开环。
CATIVIELA, C.;DIAZ, DE, VILLEGAS, M. D.;GARCIA, J. I.;MAYORAL, J. A.;MELE+, AN. QUIM. PUBL. REAL SOC. ESP. QUIM., 1985, 81, N 1, 56-61
作者:CATIVIELA, C.、DIAZ, DE, VILLEGAS, M. D.、GARCIA, J. I.、MAYORAL, J. A.、MELE+
DOI:——
日期:——
Synthesis of new simplified hemiasterlin derivatives with α,β-unsaturated carbonyl moiety
作者:Chinh Pham The、Tuyet Anh Dang Thi、Thi Phuong Hoang、Quoc Anh Ngo、Duy Tien Doan、Thu Ha Nguyen Thi、Tham Pham Thi、Thu Ha Vu Thi、M. Jean、P. van de Weghe、Tuyen Nguyen Van
DOI:10.1016/j.bmcl.2014.03.091
日期:2014.5
In this Letter, we report a convenient and efficient method for the synthesis of new simplifiedderivatives of hemiasterlin in which the α,α-dimethylbenzylic moiety A is replaced by α,β-unsaturated aryl groups as Michael acceptor. Most of these derivatives have a strong cytotoxic activity on three human tumor cell lines (KB, Hep-G2 and MCF7). Analogs 17b and 17f showed a high cytotoxicity against KB