Intra- and intermolecular hetero-Diels-Alder reactions. 23. Intermolecular hetero-Diels-Alder reactions of enamino ketones at high pressure. The first significant pressure-induced diastereoselectivity in organic transformations
作者:Lutz F. Tietze、Thomas. Huebsch、Edgar. Voss、Michael. Buback、Winfried. Tost
DOI:10.1021/ja00220a071
日期:1988.6
L'addition d'une enaminone sur l'(ethyl vinyl) ether fournit un dihydro-3,4 pyranne substitue
L'addition d'une enaminone sur l'(乙基乙烯基)醚fournit un dihydro-3,4 pyranne substitue
Synthesis of 3-amino sugars of the daunosamine type through hetero-Diels-Alder reaction of enaminones
作者:Lutz F Tietze、Edgar Voß
DOI:10.1016/s0040-4039(00)85427-1
日期:1986.1
The thermally induced hetero-Diels-Alder reaction of vinyl ethers 2a-d and N-acylenaminones 3a-h leads to the diastereomeric adducts 4a-h and 5a-h in 75–98% yield providing -compounds 4a-h as the main products. Isomerisation of 4a-f with Lewis acids gives the thermodynamically more stable 5a-f. Transformation of 4 and 5 by hydrogenation leads to 3-amino sugar glycosides.