Synthesis and antitumor activity of 1-deoxybaccatin III analogs from 1-deoxybaccatin VI
作者:Yuan-You Qiu、Hai-Xia Lin、Yong-Mei Cui、Jun-Chao Shao、Dan-Hui Jin
DOI:10.1007/s00706-013-0981-z
日期:2013.10
AbstractSeveral new 1-deoxybaccatin IIIanalogs were conveniently synthesized from 1-deoxybaccatin VI with the aim of having modified ester groups at C-2 and C-4. The antitumor activity of these compounds was evaluated. The preliminary SAR analysis showed that the electronic properties of the terminal group in the substituent on C4, C9, and C10 constituted important factors to the cytotoxic activities
Synthesis and Biological Evaluation of 1-Deoxypaclitaxel Analogues
作者:David G. I. Kingston、Mahendra D. Chordia、Prakash G. Jagtap、Jingyu Liang、Ya-Ching Shen、Byron H. Long、Craig R. Fairchild、Kathy A. Johnston
DOI:10.1021/jo981406l
日期:1999.3.1
The naturally occurring taxoid baccatin VI has been converted to various 1-deoxypaclitaxel derivatives by selective deacylation followed by attachment of the C-13 sidechain. The bioactivities of the resulting analogues were determined in both tubulin polymerization and cytotoxicity assays, and several analogues with activity comparable to that of paclitaxel were discovered. It thus appears that the
7,9-dideacetyl-1-deoxybaccatinVI was synthesized from 1-deoxybaccatinVI and its crystal structure was determined by X-ray crystallographic techniques. The compound (C33H42O11·2CH4O) crystallizes into monoclinic space group P21 with unit cell parameters: a=8.654(17) Å, b=16.470(5) Å, c=12.671(3) Å, β=97.63(2)°, and Z=2. The X-ray results demonstrated that the reaction of 7,9,10-Trideacetyl-1-deoxy-baccatinVI with Ac2O in tetrahydrofuran, using CeCl3 as catalyst, yielded monoacetylated product 7,9-dideacetyl-1-deoxy baccatinVI. In the structure, the six-membered A ring exhibits boat conformation, the eight-membered B ring adopts boat-chair conformation, and the six-membered C ring exhibits sofa conformation.
以 1-脱氧巴卡丁六为原料合成了 7,9-二乙酰基-1-脱氧巴卡丁六,并通过 X 射线晶体学技术确定了其晶体结构。该化合物(C33H42O11-2CH4O)结晶为单斜空间群 P21,单胞参数为:a=8.654(17) 埃,b=16.470(5) 埃,c=12.671(3) 埃,β=97.63(2)°,Z=2。X 射线结果表明,以 CeCl3 为催化剂,7,9,10-三乙酰基-1-脱氧巴卡丁 VI 与 Ac2O 在四氢呋喃中反应,生成单乙酰化产物 7,9-二乙酰基-1-脱氧巴卡丁 VI。在该结构中,六元 A 环呈舟形构象,八元 B 环呈舟椅形构象,六元 C 环呈沙发形构象。