Highly Selective Synthesis of Halomon, Plocamenone, and Isoplocamenone
摘要:
Over 160 chiral vicinal bromochlorinated natural products have been identified; however, a lack of synthetic methods for the selective incorporation of halogens into organic molecules has hindered their synthesis. Here we disclose the first total synthesis and structural confirmation of isoplocamenone and plocamenone, as well as the first selective and scalable synthesis of the preclinical anticancer natural product halomon. The synthesis of these inter-halogenated compounds has been enabled by our recently developed chemo-, regio-, and enantioselective dihalogenation reaction.
Myrcenol-Based Monomer for Carbanionic Polymerization: Functional Copolymers with Myrcene and Bio-Based Graft Copolymers
作者:Christian Wahlen、Moritz Rauschenbach、Jan Blankenburg、Erik Kersten、Christopher P. Ender、Holger Frey
DOI:10.1021/acs.macromol.0c01734
日期:2020.10.27
−67 to −23 °C. The P(Myr-co-MyrOH) copolymers are valuable building blocks for the synthesis of more complex polymer architectures, such as graftcopolymers. The P(Myr-co-MyrOH) copolymers were used for the synthesis of graftcopolymers consisting of a flexible polymyrcene backbone and poly(l-lactide) side chains using the “grafting from” approach. The graftcopolymers are promising candidates for bio-based
含生物基的含羟基的二烯单体,甲硅烷基保护的β-月桂烯醇(MyrOSi),被引入碳负离子聚合领域。在环己烷中聚合,使用仲丁基锂作为引发剂,得到均聚物,其均分子量控制在7.9-31.3 kg mol -1的范围内,分散度在1.10和1.27之间。甲硅烷基保护基可在温和条件下使用四正丁基氟化铵(TBAF)定量除去,从而得到定义明确的聚月桂烯醇。还研究了MyrOSi与β-月桂烯的统计共聚。用1评估共聚物的单体序列分布1 H NMR动力学研究。对于β-月桂烯/ MyrOSi共聚观察到无规共聚。具有变化MyrOH含量,在全范围在0和100%(摩尔)之间MyrOH共聚物,合成(Đ ≤1.11)并表征关于其玻璃化转变温度和聚二烯的微结构。随着聚合物主链中MyrOH含量的增加,观察到3,4-单元数量的增加,导致T g从-67升高至-23°C。P(Myr- co- MyrOH)共聚物是用于合成更复杂的聚合物结
METHOD FOR UTILIZING MONOTERPENE GLYCOSYLTRANSFERASE
申请人:Suntory Holdings Limited
公开号:EP2660327A1
公开(公告)日:2013-11-06
The object of the present invention is to provide a novel method for producing a terpene 8-glycoside.
The present invention provides a method for producing a terpene 8-glycoside by means of glycosyltransferase acting on the 8-position of terpenes. The present invention provides a transformant transformed with a gene for the glycosyltransferase acting on the 8-position of terpenes and a method for producing such a transformant. The present invention provides a plant modified to suppress the expression of a protein having glycosylation activity on the 8-position of a monoterpene compound.