尽管有许多试剂组合可以引发多烯环化,但尚未证明简单的亲电子卤素源作为此类过程的促进剂广泛有效。本文描述了一类易于制备且稳定的试剂,能够对源自香叶醇、法呢醇和橙花醇的各种富电子和缺电子萜烯进行此类转化,从而能够有效合成多种复杂的氯- 、含溴和含碘的多环骨架。迄今为止的努力已导致抗 HIV 天然产物 Peyssonol A 的第一个外消旋实验室全合成和结构修订,以及 peyssonoic acid A 的有效和简洁的首次全合成。他们还允许正式的外消旋全合成 aplysin- 20、萝莉莉德、K-76、和 Stemodin 将通过通常比以前的努力更短、产量更高且更具环保意识的途径来实现。还描述了使用该试剂类的手性形式进行对映选择性烯烃卤化的初步尝试。
Development of the Regiodivergent Asymmetric Prenylation of 3‐Substituted Oxindoles
作者:Barry M. Trost、Walter H. Chan、Sushant Malhotra
DOI:10.1002/chem.201605810
日期:2017.3.28
oxindoles that affords access to both the linear and reverse‐prenylated products. Both 3‐alkyl‐ and 3‐aryloxindoles performed well under our optimized reaction conditions. The regiodivergent alkylation of monoterpene‐derived electrophiles using this methodology was also investigated. The utility of this methodology in naturalproduct synthesis was demonstrated through the efficient total syntheses of four
UNIQUE HALOGEN-INDUCED CYCLIZATIONS, REAGENTS THEREFOR, AND COMPOUNDS PRODUCED THEREBY
申请人:Snyder Scott Alan
公开号:US20140243404A1
公开(公告)日:2014-08-28
This disclosure is related to halonium compounds useful for cyclization of polyenes, alkenoic acids, and alkenyl alkyl ethers, and halogenation of aromatic compounds. The synthesis of such halonium compounds, compounds made using such halonium compounds, and synthesis of natural compounds, including decalins, using the halonium compounds is also disclosed. A representative halonium compound of the disclosure is:
Simple Reagents for Direct Halonium-Induced Polyene Cyclizations
作者:Scott A. Snyder、Daniel S. Treitler、Alexandria P. Brucks
DOI:10.1021/ja106813s
日期:2010.10.13
Although there are many reagent combinations that can initiate polyenecyclizations, simple electrophilic halogen sources have not yet proven broadly effective as promoters of such processes. Herein is described a readily prepared and stable class of reagents capable of effecting such transformations for a wide range of electron-rich and -deficient terpenes derived from geraniol, farnesol, and nerol
尽管有许多试剂组合可以引发多烯环化,但尚未证明简单的亲电子卤素源作为此类过程的促进剂广泛有效。本文描述了一类易于制备且稳定的试剂,能够对源自香叶醇、法呢醇和橙花醇的各种富电子和缺电子萜烯进行此类转化,从而能够有效合成多种复杂的氯- 、含溴和含碘的多环骨架。迄今为止的努力已导致抗 HIV 天然产物 Peyssonol A 的第一个外消旋实验室全合成和结构修订,以及 peyssonoic acid A 的有效和简洁的首次全合成。他们还允许正式的外消旋全合成 aplysin- 20、萝莉莉德、K-76、和 Stemodin 将通过通常比以前的努力更短、产量更高且更具环保意识的途径来实现。还描述了使用该试剂类的手性形式进行对映选择性烯烃卤化的初步尝试。