Total synthesis of acerogenins E, G and K, and centrolobol
摘要:
The first total synthesis of the diaiylheptanoid acerogenins E and K, isolated from Acer nikoense MAXIM., is described. Formation of the 13-membered m,m-cyclophane skeleton was successfully achieved on the basis of a domino process involving a Miyaura arylborylation intramolecular Suzuki reaction. The cyclization precursor was prepared via a Wittig reaction and Claisen Schmidt condensation, which proceeded in moderate yields. The total synthesis of acerogenin G and centrolobol was also achieved from a common synthetic intermediate. (C) 2013 Elsevier Ltd. All rights reserved.
Total synthesis of acerogenins E, G and K, and centrolobol
摘要:
The first total synthesis of the diaiylheptanoid acerogenins E and K, isolated from Acer nikoense MAXIM., is described. Formation of the 13-membered m,m-cyclophane skeleton was successfully achieved on the basis of a domino process involving a Miyaura arylborylation intramolecular Suzuki reaction. The cyclization precursor was prepared via a Wittig reaction and Claisen Schmidt condensation, which proceeded in moderate yields. The total synthesis of acerogenin G and centrolobol was also achieved from a common synthetic intermediate. (C) 2013 Elsevier Ltd. All rights reserved.
Novel perfluoroketone compounds of formula [I] and [Ia] are described. Also described are uses thereof, such as for inhibition of phospholipase A
2
activity. Therapeutic uses thereof are also described, such as for the treatment of neural conditions and/or inflammatory conditions, such as demyelinating (e.g., multiple sclerosis) and neural injury (e.g., spinal cord injury).
Suzuki−Miyaura Cross-Coupling Reactions of Primary Alkyltrifluoroborates with Aryl Chlorides
作者:Spencer D. Dreher、Siang-Ee Lim、Deidre L. Sandrock、Gary A. Molander
DOI:10.1021/jo900152n
日期:2009.5.15
Parallel microscale experimentation was used to develop general conditions for the Suzuki-Miyaura cross-coupling of diversely functionalized primary alkyltrifluoroborates with a variety of aryl chlorides. These conditions were found to be amenable to coupling with aryl bromides, iodides, and triflates as well. The conditions that were previously identified through similar techniques to promote the cross-coupling of secondary alkyltrifluoroborates with aryl chlorides were not optimal for the primary alkyltrifluoroborates, thus demonstrating the value of parallel experimentation to develop novel, substrate specific results.
Kin, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1943, vol. 63, p. 376,381
作者:Kin
DOI:——
日期:——
Total synthesis of acerogenins E, G and K, and centrolobol
作者:Tetsuhiro Ogura、Toyonobu Usuki
DOI:10.1016/j.tet.2013.01.065
日期:2013.4
The first total synthesis of the diaiylheptanoid acerogenins E and K, isolated from Acer nikoense MAXIM., is described. Formation of the 13-membered m,m-cyclophane skeleton was successfully achieved on the basis of a domino process involving a Miyaura arylborylation intramolecular Suzuki reaction. The cyclization precursor was prepared via a Wittig reaction and Claisen Schmidt condensation, which proceeded in moderate yields. The total synthesis of acerogenin G and centrolobol was also achieved from a common synthetic intermediate. (C) 2013 Elsevier Ltd. All rights reserved.