Oxidation of α-amidoaryl sulfones with m-chloroperoxybenzoic acid under mild conditions readily provides the corresponding imides in satisfactory yields. The overall process probably involves formation of an N-acyliminium ion intermediate, which by attack of the peroxyacid anion generates the final imidoderivatives.
A triphenylphosphine-promoted [3+2] cycloaddition of α,γ-bis-substituted allenoates and N-tosylaldimines followed by alkene isomerization was disclosed, affording a series of functionalized 2-pyrroline derivatives in moderate chemical yields with random diastereoselectivities.
Conversion of <i>N</i>-Benzyloxycarbonylamino- and <i>N</i>-Tosylamino-Benzyl Phenylsulfones by Green Strecker Reactions to α-Aminobenzyl Nitriles Using Potassium Hexacyanoferrate(II)
作者:Xiaochun Hu、Rongzhi Li、Zheng Li
DOI:10.3184/174751914x14030207593683
日期:2014.7
α-aminobenzyl nitriles has been achieved by eco-friendly Strecker reactions using potassium hexacyanoferrate(II) as a cyanide source, benzoyl chloride as a promoter, and potassium hydroxide as a base. The protocol has the advantages of using a nontoxic, nonvolatile and inexpensive cyanatingagent, employing a simple work-up procedure and producing high yields.
使用六氰基高铁酸钾 (II) 作为氰化物源,通过生态友好的 Strecker 反应实现了由 N-苄氧基羰基氨基和 N-甲苯磺基氨基-苄基苯砜原位生成的醛亚胺氰化为相应的 N-保护的 α-氨基苄基腈,苯甲酰氯作为促进剂,氢氧化钾作为碱。该协议的优点是使用无毒、非挥发性和廉价的氰化剂,采用简单的处理程序,产量高。
Efficient Synthesis of N-Carbamoylpropargylamines from α-Amido Sulfones Using Dimethylalkynylaluminum Reagents
作者:Sang-Hyeup Lee、Ji-Hoon Lee
DOI:10.1055/s-0041-1737763
日期:2022.5
reagents derived from terminal alkynes and trimethylaluminum underwent addition to various N-activated α-amidosulfones to produce the corresponding alkynylamines in moderate to excellent yields. The optimized protocol avoids the preparation and isolation of relatively unstable N-activated imines that are generated in situfrom their corresponding, stable, N-activated α-amidosulfones. This methodology
Aminoalcohol derivatives by nickel-catalyzed enantioselective coupling of imines and dienol ethers
作者:Jae Yeon Kim、Thomas Q. Davies、Alois Fürstner
DOI:10.1039/d3cc04582j
日期:——
reductive coupling of dienol ethers with N-tosylimines catalyzed by Ni(0) in the presence of a VAPOL-derived phosphoramidite ligand follows an unprecedented regiochemicalcourse; it furnishes syn-configured 1,2-aminoalcohol derivatives in good chemical yields with up to 94% ee.
在 VAPOL 衍生的亚磷酰胺配体存在下,二烯醇醚与N-甲苯磺酰亚胺在 Ni(0) 催化下发生还原偶联,遵循前所未有的区域化学过程;它以良好的化学收率提供顺式构型的 1,2-氨基醇衍生物,其 ee 高达 94%。