The intramolecular Morita–Baylis–Hillman-type alkylation reaction
作者:John W. Cran、Marie E. Krafft、Kimberly A. Seibert、Thomas F.N. Haxell、James A. Wright、Chitaru Hirosawa、Khalil A. Abboud
DOI:10.1016/j.tet.2011.09.061
日期:2011.12
From the initial development of a homologous Morita–Baylis–Hillman reaction utilizing epoxides as electrophiles, the method was expanded to enable the exclusively organocatalyzed intramolecular allylation of enones and to develop the intramolecular MBH-type alkylation of activated alkenes. We successfully utilized both enones and unsaturated thioesters as the activated alkene component. This work,
starting materials using Wittig reactions as the key transformations for construction of the carbon skeleton. The penultimate synthetic intermediate was 2E,6Z,8E,10E-dodecatetraenoic acid, and its crystallinenature allowed it, and thus hydroxy-α-sanshool, to be purified to a very high level of stereochemical homogeneity.
A potentially general method to control relative stereochemistry in enone–olefin 2+2-photocycloaddition reactions by using eniminium salt surrogates
作者:Xiaolu Cai、Virginia Chang、Chuanfeng Chen、Hyun-Jin Kim、Patrick S Mariano
DOI:10.1016/s0040-4039(00)01581-1
日期:2000.12
A new strategy to control the stereochemistry of enone–olefin2+2-photocycloaddition reactions, based on the use of eniminium salt surrogates, is experimentally tested. In contrast to enone–olefinphotocycloadditions, which emanate from enone triplet excited states and follow non-concerted pathways, analogous reactions of conjugated eniminium salts can occur by singlet, concerted routes and, as a result
PRODUCTION METHOD OF (2E,6Z,8E)-N-ISOBUTYL-2,6,8-DECATRIENAMIDE (SPILANTHOL), AND FOOD OR DRINK, FRAGRANCE OR COSMETIC, OR PHARMACEUTICAL COMPRISING THE SAME
申请人:Tanaka Shigeru
公开号:US20110105773A1
公开(公告)日:2011-05-05
A problem as an object of the invention is to provide a production method of spilanthol in a large scale without using expensive reagents. The present invention provides a production method of N-isobutyl-2,6,8-decatrienamide, wherein a column chromatography purification step is not required in all processes.
Production method of (2E,6Z,8E)-N-isobutyl-2,6,8-decatrienamide (spilanthol), and food or drink, fragrance or cosmetic, or pharmaceutical comprising the same
申请人:Takasago International Corporation
公开号:US08217192B2
公开(公告)日:2012-07-10
A problem as an object of the invention is to provide a production method of spilanthol in a large scale without using expensive reagents. The present invention provides a production method of N-isobutyl-2,6,8-decatrienamide, wherein a column chromatography purification step is not required in all processes.