[EN] COMPOUNDS AND METHODS FOR THE SYNTHESIS OF 5-(N-PROTECTED-TRYPTAMINOCARBOXYAMIDE)-2'-DEOXYURIDINE PHOSPHORAMIDATE FOR INCORPORATION INTO A NUCLEIC SEQUENCE [FR] COMPOSÉS ET PROCÉDÉS POUR LA SYNTHÈSE DE PHOSPHORAMIDATE DE 5-(TRYPTAMINOCARBOXYAMIDE À N PROTÉGÉ)-2'-DÉSOXYURIDINE DESTINÉ À ÊTRE INCORPORÉ DANS UNE SÉQUENCE NUCLÉIQUE
Copper-Catalyzed Cyclization of Iodo-tryptophans: A Straightforward Synthesis of Pyrroloindoles
摘要:
Pyrroloindoles are a key structural motif found in a wide number of biologically active alkaloids. Intramolecular copper-catalyzed coupling of readily accessible 2-iodo-tryptophan derivatives occurs in excellent yield, affording a wide range of polysubstituted, enantioenriched tetrahydropyrrolo[2,3-b]indoles. Diketopiperazines are also suitable substrates for this cyclization reaction, which affords a straightforward entry to tetra- to hepta-polycyclic systems.
Nickel-Catalyzed Reductive Vinylation of Chloro-hexahydropyrroloindoline Derivatives with Vinyl Triflates
作者:Lei Su、Guobin Ma、Yanhong Song、Hegui Gong
DOI:10.1021/acs.orglett.1c00431
日期:2021.4.2
This work emphasizes facile construction of C-3a vinyl substituted hexahydropyrrolidinoindolines based upon Ni-catalyzed reductive coupling of chloro-hexahydropyrroloindoline derivatives with a wide range of alkyl-decorated vinyl triflates. The remarkable compatibility of sterically hindered branched vinyl groups is highlighted.
A method for the synthesis of C3a acetoxy hexahydropyrrolo[2,3-b]indole derivatives via a PhI(OAc)2/nBu4NI mediated tandem iodocyclization/acetoxylation has been developed. The newly developed synthetic strategy features the single-step assembly of various C3a acetoxylated tetrahydropyrrole-, tetrahydrofuran-, and lactone-fused indolines under mild reaction conditions, which enabled efficient asymmetric
已经开发了一种通过PhI(OAc) 2 / n Bu 4 NI 介导的串联碘环化/乙酰氧基化合成C3a乙酰氧基六氢吡咯并[2,3- b ]吲哚衍生物的方法。新开发的合成策略的特点是在温和的反应条件下单步组装各种 C3a 乙酰氧基化四氢吡咯、四氢呋喃和内酯稠合的二氢吲哚,从而能够有效地不对称合成 (-)-protubonine B。