Bicyclo[1.1.1]pentane (BCP) replacement as a bioisostere in drug molecules has an influence on their permeability, aqueous solubility and in vitro metabolic stability. Thus, the chemical installation of the BCP unit into a chemical entity remains a significant challenge from a synthetic point of view. Here, we have presented a new approach for the installation of the BCP unit on the xanthate moiety
Access to the γ-amino-β,γ-unsaturated acyl scaffold was established by applying xanthate chemistry to enamides. This original β-C(sp2)–H alkylation is regioselective and exhibits broad substrate scope and good functional group tolerance. The large availability of xanthates is advantageous to the scope of the reaction which combines a radical process and a polar reaction.
Radical Fragment Coupling Route to Geminal Bis(boronates)
作者:Qi Huang、Samir Z. Zard
DOI:10.1021/acs.orglett.8b02235
日期:2018.9.7
atom abstraction and delivers a vast array of highly functional geminal bis(boronates). The ability to assemble geminal bis(boronates) bearing polar functional groups not readily obtained through existing methods is particularly noteworthy. This approach also opens up access to geminal bis(boronyl) cyclopropanes and geminal bis(boronyl) tetrahydroquinolines.
Microwave-assisted C-3 selective oxidative radical alkylation of flavones
作者:Marco V. Mijangos、Joaquin González-Marrero、Luis D. Miranda、Paulette Vincent-Ruz、Armando Lujan-Montelongo、Diana Olivera-Díaz、Elhiu Bautista、Alfredo Ortega、María de la Luz Campos-González、Rocio Gamez-Montaño
DOI:10.1039/c2ob25249j
日期:——
Flavones were directly alkylated at the C-3 position in moderate yields using a xanthate-based oxidative radical addition procedure. This methodology is a suitable synthetic tool for the direct substitution of the vinylic and unactivated C–H bond of the C ring of the flavone by an alkyl functionality under neutral conditions.
Synthesis of azepino[4,5-b]indolones via an intermolecular radical oxidative substitution of N-Boc tryptamine
作者:Paul E. Reyes-Gutiérrez、Rubén O. Torres-Ochoa、Roberto Martínez、Luis D. Miranda
DOI:10.1039/b821260k
日期:——
A two-step protocol for the synthesis of azepino[4,5-b]indolone derivatives featuring a xanthate radical oxidative aromatic substitution on the N-Boc protected tryptamine, using dilauroyl peroxide (DLP) as initiator and oxidant, is described.
使用N- Boc保护的色胺上具有黄药酸酯氧化性芳族取代基的azepino [4,5- b ]吲哚酮衍生物的两步合成方法,使用过氧化二月桂酰 描述了作为引发剂和氧化剂的(DLP)。