A detailed investigation of the aza-Prins reaction
作者:Adrian P. Dobbs、Sebastien J. J. Guesné、Robert J. Parker、John Skidmore、Richard A. Stephenson、Mike B. Hursthouse
DOI:10.1039/b915797b
日期:——
The development of a Lewis acid-promoted aza-Prins reaction to form piperidines and pyrrolidines is described. Indium trichloride has been found to be a highly successful and mild Lewis acid for promoting this reaction. A thorough mechanistic investigation is described, including the factors that influence the formation of the 5- or 6-membered ring product(s).
between the Ir and two σ C−H bonds from a tBu substituent, has been prepared. This complex exhibits exceptionally high activity and excellent regio‐ and stereoselectivity for monoisomerization of 1‐alkenes to trans‐2‐alkenes with wide functional‐group tolerance. Reactions can be performed in neat reactant on a more than 100 gram scale using 0.005 mol % catalyst loadings with turnover numbers up to 19000.
制备了一种独特的Ir络合物(tBu NC C P)Ir,其中吡啶-膦钳夹为唯一配体,其特征在于Ir与来自t Bu取代基的两个σC-H键之间具有双重原子相互作用。该复合物具有极高的活性,并具有极好的区域和立体选择性,可将1烯烃单异构化为反式-2-烯烃,且具有宽泛的官能团耐受性。可以使用0.005 mol%的催化剂负载量(周转数高达19000)在超过100克的纯净反应物中进行反应。