Enantioselective palladium catalyzed conjugate additions of ortho-substituted arylboronic acids to β,β-disubstituted cyclic enones: total synthesis of herbertenediol, enokipodin A and enokipodin B
作者:Jeffrey Buter、Renée Moezelaar、Adriaan J. Minnaard
DOI:10.1039/c4ob01085j
日期:——
Palladium catalyzed asymmetric conjugate addition of ortho-substituted arylboronic acids to cyclic enones and its application in natural product synthesis.
钯催化的手性共轭加成,将邻位取代的芳基硼酸加到环状烯酮上,并在天然产物合成中的应用。
Enantioselective Total Synthesis of Enokipodins A–D, Antimicrobial Sesquiterpenes Produced by the Mushroom, <i>Flammulina velutipes</i>
作者:Mana SAITO、Shigefumi KUWAHARA
DOI:10.1271/bbb.69.374
日期:2005.1.1
first enantioselective total synthesis of enokipodins A, B, C and D, highly oxidized alpha-cuparenone-type sesquiterpenoids possessing antimicrobialactivity, was accomplished in 8-28% overall yields from methyl (2,5-dimethoxy-4-methylphenyl)acetate by applying Meyers' diastereoselective alkylation protocol for the construction of their C7-quaternary asymmetric center. The present synthesis confirmed
Enantioselective total synthesis of enokipodins A–D
作者:Shigefumi Kuwahara、Mana Saito
DOI:10.1016/j.tetlet.2004.04.191
日期:2004.6
The first enantioselective total synthesis of enokipodins A–D, highly oxidized α-cuparenone-type sesquiterpenoids with antimicrobialactivity, was accomplished by using Meyers' diastereoselective alkylation protocol for the construction of the C7-quaternary asymmetric center. The present synthesis also constitutes a formal enantioselectivesynthesis of (S)-1,4-cuparenediol and (S)-cuparene-1,4-quinone
Total Syntheses of Enokipodins A and B Utilizing Palladium-Catalyzed Addition of An Arylboronic Acid to An Allene
作者:Masahiro Yoshida、Yasunobu Shoji、Kozo Shishido
DOI:10.1021/ol9001637
日期:2009.3.19
The enantioselective total syntheses of enokipodins A and B, alpha-cuparenone-type sesquiterpenoids with antimicrobial activity, have been achieved. The key step is the enantiospecific construction of the quaternary carbon center using a palladium-catalyzed addition of an arylboronic acid to an allene followed by an Eschenmoser-Claisen rearrangement.
Synthesis of Cyclopentenones with C4-Quaternary Stereocenters via Stereospecific [3,3]-Sigmatropic Rearrangement and Applications in Total Synthesis of Sesquiterpenoids
作者:Weiping Zhou、Arnaud Voituriez
DOI:10.1021/jacs.1c07966
日期:2021.10.27
A cationic gold(I)-catalyzed asymmetric [3,3]-sigmatropic rearrangement of sulfonium leads after cyclization to cyclopentenones with a C4-quaternary stereocenter. Starting with simple vinyl sulfoxides and propargyl silane, numerous compounds were isolated with moderate to good yields and excellent enantiomeric excesses (26 examples). The application of this simple methodology allowed the efficient
锍的阳离子金 (I) 催化不对称 [3,3]-σ 重排在环化后生成具有 C4-季立体中心的环戊烯酮。从简单的乙烯基亚砜和炔丙基硅烷开始,以中等至良好的收率和优异的对映异构体过量分离了许多化合物(26 个实例)。应用这种简单的方法可以有效地合成五种天然倍半萜类化合物,包括 enokipodin A 和 B、hitoyopodin A、lagopodin A 和 isocuparene-3,4-diol。