Asymmetric Intermolecular Pauson−Khand Reactions of Unstrained Olefins: The (<i>o</i>-Dimethylamino)phenylsulfinyl Group as an Efficient Chiral Auxiliary
作者:Marta Rodríguez Rivero、Juan Carlos de la Rosa、Juan Carlos Carretero
DOI:10.1021/ja038491l
日期:2003.12.1
The first asymmetric version of intermolecular Pauson-Khand reactions of unstrained alkenes is described. Generally simple acyclic alkenes exhibit low reactivity and regioselectivity in intermolecular Pauson-Khand reactions; however, o-(dimethylamino)phenyl vinyl sulfoxide reacts under very mild conditions with a wide variety of terminal alkynes in a completely regioselective and highly stereoselective
描述了无应变烯烃的分子间 Pauson-Khand 反应的第一个不对称版本。通常,简单的无环烯烃在分子间 Pauson-Khand 反应中表现出低反应性和区域选择性;然而,邻(二甲氨基)苯基乙烯基亚砜在非常温和的条件下以完全区域选择性和高度立体选择性的方式与多种末端炔烃反应。抗生素 (-)-戊烯霉素 I 的非常短的对映选择性合成说明了所得 5-亚磺酰基-2-环戊烯酮在不对称合成中的应用。
TROPANE DERIVATIVES AND METHOD FOR THEIR SYNTHESIS
申请人:GEORGETOWN UNIVERSITY
公开号:EP0944626A1
公开(公告)日:1999-09-29
EP0944626A4
申请人:——
公开号:EP0944626A4
公开(公告)日:2002-09-04
[EN] TROPANE DERIVATIVES AND METHOD FOR THEIR SYNTHESIS<br/>[FR] DERIVES TROPANE ET PROCEDE DE SYNTHESE
申请人:——
公开号:WO1998024788A1
公开(公告)日:1998-06-11
[EN] A compound of formula (I) wherein R1 - R6 have any of the values defined in the specification, as well as pharmaceutical compositions comprising a compound of formula (I), and methods for preparing and using compounds of formula (I) are described. [FR] La présente invention concerne un composé représenté par la formule générale (I) dans laquelle R1 - R6 représentent n'importe quelle valeur définie dans la spécification. La présente invention concerne également des compositions pharmaceutiques comprenant un composé représenté par la formule (I), des procédés de préparation et des techniques d'utilisation des composés représentés par la formule (I).
Vinyl Sulfoxides as Stereochemical Controllers in Intermolecular Pauson-Khand Reactions: Applications to the Enantioselective Synthesis of Natural Cyclopentanoids
作者:Marta Rodríguez Rivero、Inés Alonso、Juan C. Carretero
DOI:10.1002/chem.200400443
日期:2004.11.5
diastereoselectivity (de=86->96 %, (S,R(S)) diastereomer). Experimental studies suggest that the high reactivity exhibited by the vinyl sulfoxide 1 i relies on the ability of the amine group to act as a soft ligand on the alkyne dicobalt complex prior to the generation of the cobaltacycle intermediate. On the other hand, both theoretical and experimental studies show that the high stereoselectivity of the process is