Intramolecular 4 + 3 Cycloadditions. Aspects of Stereocontrol in the Synthesis of Cyclooctanoids. A Synthesis of (+)-Dactylol
摘要:
The judicious placement of stereocenters on precursors for 4 + 3 cycloaddition reactions can lead to high levels of stereocontrol in the 4 + 3 cycloaddition process of cyclopentenyl cations and tethered butadienes. This concept was successfully tested in the context of a synthesis of (+)-dactylol.
Intramolecular [4 + 3] cycloadditions – Stereochemical issues in the cycloaddition reactions of cyclopentenyl cations – A synthesis of (+)-dactylol
作者:Michael Harmata、Paitoon Rashatasakhon、Charles L Barnes
DOI:10.1139/v06-122
日期:2006.10.1
Five cyclopentanones were prepared for the purpose of examining the effects of stereogenic centers on the course of the intramolecular [4 + 3] cycloaddition reactions of cyclopentenyl cations. One substrate reacted with very high levels of diastereoselectivity and was converted to (+)-dactylol. The cyclopentenone without stereogenic centers on the tether or the five-membered ring gave two cycloadducts
Intramolecular 4 + 3 Cycloadditions. Aspects of Stereocontrol in the Synthesis of Cyclooctanoids. A Synthesis of (+)-Dactylol
作者:Michael Harmata、Paitoon Rashatasakhon
DOI:10.1021/ol006390b
日期:2000.9.1
The judicious placement of stereocenters on precursors for 4 + 3 cycloaddition reactions can lead to high levels of stereocontrol in the 4 + 3 cycloaddition process of cyclopentenyl cations and tethered butadienes. This concept was successfully tested in the context of a synthesis of (+)-dactylol.