A novel approach to 3-acylated indolizine structures via iodine-mediated hydrative cyclization
摘要:
We have discovered a new route to 3-acylated indolizine structures via iodine-mediated hydrative cyclization. Reaction mechanism is proposed for this novel transformation, which involves a 5-exo-dig iodocyclization, deprotonation, incorporation of another iodo group, deprotonation, and subsequent replacement of the diiodo group by H2O. Various 3-acylated indolizine derivatives were obtained using this mild procedure in good yields. (c) 2007 Elsevier Ltd. All rights reserved.
Stereoselective synthesis of optically active cyclopenta[c]pyrans and cyclopenta[c]furans by the intramolecular Pauson–Khand reaction
作者:Serdar Sezer、Ertan Şahin、Cihangir Tanyeli
DOI:10.1016/j.tetasy.2010.02.016
日期:2010.3
An intramolecular Pauson–Khand reaction of enynes derived from homoallyl, homopropargyl, and allyl alcohols is described. 2-Heteroaryl-substituted homoallyl, homopropargyl, and allyl alcohols are easily and efficiently resolved through enzymatic resolution in high ee (91–99%) and with a known stereochemistry. Each enantiomerically enriched enyne derived from homoallyl and homopropargyl alcohols affords
描述了由高烯丙基,高炔丙基和烯丙醇衍生的烯炔的分子内Pauson-Khand反应。2-杂芳基取代的均烯丙基,高炔丙基和烯丙醇可以通过高ee(91-99%)的酶解和已知的立体化学方法轻松高效地拆分。从高烯丙基和高炔丙基醇,得到构象最稳定的非对映体环戊二烯并[导出的各对映体富集的烯炔Ç ]吡喃环系统作为唯一的产物,而由烯丙基醇得到非对映体衍生的对映体富集烯炔顺:反式的环戊二烯的混合物[ C ^ ]呋喃铃声系统。
Scalable Regioselective and Stereoselective Synthesis of Functionalized (<i>E</i>)-4-Iodobut-3-en-1-ols: Gram-Scale Total Synthesis of Fungal Decanolides and Derivatives
作者:Alexander M. Sherwood、Samuel E. Williamson、Stephanie N. Johnson、Anil Yilmaz、Victor W. Day、Thomas E. Prisinzano
DOI:10.1021/acs.joc.7b02324
日期:2018.1.19
A reliable protocol to synthesize both racemic and chiral (E)-4-iodobut-3-en-1-ols from aldehydes or epoxides, respectively, containing various aromatic and aliphatic substitutions has been established. The utility of these compounds was then demonstrated by providing access to known fungal decanolides as well as novel aromatic macrocycles. The protocol provided a gram-scale route to (−)-aspinolide
Silylcyclopropanes by Selective [1,4]-Wittig Rearrangement of 4-Silyl-5,6-dihydropyrans
作者:Luis M. Mori-Quiroz、Emmanuel W. Maloba、Robert E. Maleczka
DOI:10.1021/acs.orglett.1c01838
日期:2021.8.6
selective [1,4]-Wittig rearrangements to give silylcyclopropanes in good yields. The selectivity is independent of the silyl group, but it is influenced by the electronic character of the migrating center. Electron-rich and electron-neutral (hetero)aryl groups and aliphatic substituents at the migrating center lead to exclusive [1,4]-migration, whereas electron-deficient aryl groups predominantly afford
The invention provides a compound of formula I:
1
wherein G, R
2
, R
3
, and R
4
have any of the values defined in the specification, or a pharmaceutically acceptable salt thereof, as well as processes and intermediates useful for preparing such compounds or salts, and methods of treating a herpesvirus infection using such compounds or salts.
The invention provides a compound of formula I:
wherein G, R
2
, R
3
, and R
4
have any of the values defined in the specification, or a pharmaceutically acceptable salt thereof, as well as processes and intermediates useful for preparing such compounds or salts, and methods of treating a herpesvirus infection using such compounds or salts.