molecular sieves as an additive. The reaction conditions were suitable to 4-alkyl and benzyl-substituted azlactones as well as N-(benzyl/alkyl/arylthio)succinimides, affording adducts with high enantioselectivities (81–94% ee).
ammonium salt‐catalyzed synthesis of chiral 3,3‐disubstituted isoindolinones bearing a heteroatom functionality in the 3‐position. A broad variety of differently substituted CF3S‐ and RS‐derivatives were obtained with often high enantioselectivities when using Maruoka's bifunctional chiral ammonium salt catalyst. In addition, a first proof‐of‐concept for the racemic synthesis of the analogous F‐containing
我们在此报告了铵盐催化合成在3位带有杂原子官能团的手性3,3-二取代异吲哚啉酮。使用 Maruoka 的双功能手性铵盐催化剂时,可以获得多种不同取代的 CF 3 S 和 RS 衍生物,且通常具有较高的对映选择性。此外,还获得了类似含 F 产品外消旋合成的第一个概念验证,从而获得了相当稳定的 α-F-α-氨基酸衍生物的罕见例子之一。
Decarboxylative Radical Sulfilimination via Photoredox, Copper, and Brønsted Base Catalysis
作者:Mingjun Zhang、Lixia Liu、Yuhao Tan、Yue Jing、Yuxiu Liu、Ziwen Wang、Qingmin Wang
DOI:10.1002/anie.202318344
日期:2024.2.5
We report the protocol for decarboxylative radical sulfilimination reactions between sulfenamides and N-hydroxyphthalimide esters of primary, secondary, and tertiary alkyl carboxylic acids, which were achieved via a combination of photoredox, copper, and Brønsted base catalysis. The mild, operationally simple reaction has good functional group compatibility. Our findings provide a Brønsted base activation
We herein report the copper-catalyzed C–S bond coupling reaction of indoles with N-thiosuccinimides, resulting in moderate to excellent yields of mono- and bis-sulfenylated compounds such as arylthioindoles, alkylthioindoles, selenylated indoles, and cysteine-substituted indoles. Thioarylation and thioglycosylation at the C2 position of indole alkaloids in the Radix Isatidis were achieved via structural
The invention provides a novel method for producing an oligonucleotide using a nucleoside or oligonucleotide that is easy to isolate and has high storage stability. The oligonucleotide production method includes a step of subjecting a nucleoside or oligonucleotide having a pseudo solid phase-protecting group in at least one location selected from the group consisting of 2'-position, 3'-position, 5'-position and a nucleobase moiety and having a 5'-hydroxyl group or a 3'-hydroxyl group, to H-phosphonation to convert the 5'-hydroxyl group or the 3'-hydroxyl group into an H-phosphonated form.