The present application relates to processes for the preparation of morphine compounds utilizing a novel intramolecular [4+2] cycloaddition reaction.
本申请涉及利用一种新型分子内[4+2]环加成反应制备吗啡化合物的过程。
Process for preparing morphine compounds
申请人:Varghese Vimal
公开号:US09126965B1
公开(公告)日:2015-09-08
The present application relates to processes for the preparation of morphine compounds utilizing a novel intramolecular [4+2] cycloaddition reaction.
本申请涉及使用一种新型分子内[4+2]环加成反应制备吗啡化合物的过程。
US9126965B1
申请人:——
公开号:US9126965B1
公开(公告)日:2015-09-08
Short Chemoenzymatic Total Synthesis of<i>ent</i>-Hydromorphone: An Oxidative Dearomatization/Intramolecular [4+2] Cycloaddition/Amination Sequence
作者:Vimal Varghese、Tomas Hudlicky
DOI:10.1002/anie.201400286
日期:2014.4.22
A short synthesis of ent‐hydromorphone has been achieved in twelve steps from β‐bromoethylbenzene. The key transformations involved the enzymatic dihydroxylation of the arene to the corresponding cis‐dihydrodiol, Mitsunobu coupling with the ring A fragment, oxidativedearomatization of the C3 phenol, and the subsequent [4+2] cycloaddition to form ring B of the morphinan. The synthesis was completed