Trioxacarcins DC-45-A1、A、D、C 和 C7″-epi-C 的全合成和 Trioxacarcin C 的完整结构分配
摘要:
Trioxacarcins DC-45-A2、DC-45-A1、A、D、C7″-epi-C 和 C 已通过立体选择性策略合成,包括 BF3·Et2O 催化的酮环氧化物开环和金催化的糖基化反应,以及三氧沙星 C 的完整结构分配是通过其两个 C7″差向异构体的合成破译的。收集到的知识为这些天然产物的类似物的设计、合成和生物学评估奠定了基础,这些天然产物的类似物作为抗体-药物偶联物和其他靶向和个性化癌症化疗的递送系统的潜在有效载荷。
Stereoselective Synthesis of 1,2-<sup>13</sup>
<i>C</i>
<sub>2</sub>-<scp>l</scp>-Fucose, 1,2-<sup>13</sup>
<i>C</i>
<sub>2</sub>-Fucono-γ-lactone and 1,2-<sup>13</sup>
<i>C</i>
<sub>2</sub>-Fucono-γ-lactol from Non-Sugar Starting Material
作者:John M. Gardiner、Nitesh R. Panchal、William T. Stimpson、John M. Herbert、George J. Ellames
DOI:10.1055/s-2005-917071
日期:——
An efficientsynthesis is reported for the preparation of L-fucose, and of L-fucofuranose, from 1. The route is designed to facilitate 1 3 C labelling at Cl and/or C2, and the synthesis of 1,2- 1 3 C 2 -fucose as its tetraacelate is described. The C2 and C3 stereo-centres are introduced using asymmetric dihydroxylation, and the lactone ring size resulting from cyclisation of 4 was controlled to provide