作者:Vemula Praveen Kumar、Vaddela Sudheer Babu、Kenzo Yahata、Yoshito Kishi
DOI:10.1021/acs.orglett.7b01128
日期:2017.5.19
Fe/Cu-mediated one-pot ketonesynthesis was reported. Unlike Ni- and Pd-mediated one-pot ketone syntheses, the reported Fe/Cu-mediated method allowed selective activation and coupling of alkyl iodides over vinyl iodides. The newly developed one-pot ketonesynthesis was applied to a synthesis of vinyl iodide/ketone 13, the left half of halichondrin B, as well as vinyl iodide/ketone 8a, the C20–C26 building
[EN] FE/CU-MEDIATED KETONE SYNTHESIS<br/>[FR] SYNTHÈSE DE CÉTONE MÉDIÉE PAR FE/CU
申请人:HARVARD COLLEGE
公开号:WO2019009956A1
公开(公告)日:2019-01-10
Provided herein are methods for preparing ketone-containing organic molecules. The methods are based on novel iron/copper-mediated ("Fe/Cu-mediated") coupling reactions. The Fe/Cu-mediated coupling reaction can be used in the preparation of complex molecules, such as halichondrins and analogs thereof. In particular, the Fe/Cu-mediated ketolization reactions described herein are useful in the preparation of intermediates en route to halichondrins.
Attempts To Improve the Overall Stereoselectivity of the Ireland−Claisen Rearrangement
作者:Chi-Li Chen、Kosuke Namba、Yoshito Kishi
DOI:10.1021/ol8027225
日期:2009.1.15
With focus on the steric effects present in the transition states for the [3,3]-sigmatropic rearrangement, the substrate 5 has been designed to improve the overall stereoselectivity of the Ireland−Claisenrearrangement. Experimentally, it has been found that (1) only Z-6 rearranges to 7 at 80 °C and (2) E-6 isomerizes to Z-6 at 80 °C, thereby allowing the transformation of 5 into 7 in an almost quantitative
着眼于 [3,3]-σ 重排的过渡态中存在的空间效应,底物5已被设计为提高爱尔兰-克莱森重排的整体立体选择性。实验发现,(1) 只有Z -6在 80 °C 下重排为7和 (2) E -6 在 80 °C 下异构化为Z -6,从而允许5以几乎定量的方式转化为7屈服。为了说明这种方法的有用性,给出了两个额外的例子。
[EN] SYNTHESIS OF HALICHONDRINS<br/>[FR] SYNTHÈSE D'HALICHONDRINES
申请人:HARVARD COLLEGE
公开号:WO2019010363A8
公开(公告)日:2019-06-06
Macrocyclic compound and uses thereof
申请人:President and Fellows of Harvard College
公开号:US09938288B1
公开(公告)日:2018-04-10
The present invention provides novel Compound (1) having tumor vascular remodeling effect and/or anti-CAF (Cancer Associated Fibroblasts) activity, or a pharmaceutically acceptable salt thereof, optionally in a pharmaceutically acceptable carrier, and a medical uses thereof.