In Situ Activation of Disulfides for Multicomponent Reactions with Isocyanides and a Broad Range of Nucleophiles
作者:Xiaofang Lei、Yuanyuan Wang、Erkang Fan、Zhihua Sun
DOI:10.1021/acs.orglett.9b00275
日期:2019.3.1
Activation of disulfides with N-halogen succinimide in the presence of TEMPO allows insertion reaction by an isocyanide, the product of which can further accept a wide range of nucleophiles for the generation of isothioureas and related molecular moieties. This new procedure overcomes previous methods that accept essentially only aryl amines as the third nucleophilic component. The diverse nucleophiles
Synthesis of N-Acylsulfenamides from Amides and N-Thiosuccinimides
作者:Jessica T. Liu、Daniel S. Brandes、Jonathan A. Ellman、Nathaniel S. Greenwood
DOI:10.1055/s-0041-1738430
日期:——
recently been utilized as central inputs for the asymmetric synthesis of high oxidation state sulfur compounds. This straightforward transformation proceeds by reaction of primary amides, carbamates, sulfonamides, sulfinamides, and ureas with stable N-thiosuccinimides or N-thiophthalimides, which in turn are prepared in a single step from commercial thiols. The use of stable N-thiosuccinimide and N-thiophthalimide
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.
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.