A diastereoselective nucleophilic dichloromethylation between the N-tert-butanesulfinyl imines and dichloromethyllithium was developed. A series of 2-chloroaziridines with excellent yields and dr values were obtained via this nucleophilic addition and N-alkylation in one pot. On the basis of X-ray crystallography experiment, the predicting model for this diastereoselective transformation was provided
Indium-Promoted Diastereoselective Addition of Fluorinated Haloallylic Derivatives to Imines
作者:Gérald Lemonnier、Nathalie Van Hijfte、Thomas Poisson、Samuel Couve-Bonnaire、Xavier Pannecoucke
DOI:10.1021/jo402810s
日期:2014.4.4
We report herein the first general access to fluorinated homoallylic amines by means of an addition of fluorinated organoindium reagent. The corresponding amines were obtained in good to excellent yield with excellent diastereoisomeric ratio. A plausible mechanism is proposed to explain the stereochemical outcome of the reaction based on the X-ray structure of the products.
作者:Glebs Jersovs、Matiss Bojars、Pavel A. Donets、Edgars Suna
DOI:10.1021/acs.orglett.2c01738
日期:2022.7.1
A syntheticapproachtoward densely substituted enantiopure cyclic sulfinamides possessing up to four consecutive stereogenic centers was developed based on a completely diastereoselective SN2′ cyclization/tert-Bu cleavage sequence. Diastereospecific transformation of the obtained scaffold into chiral SVI derivatives such as sulfoximines and sulfonimidamides is demonstrated.
基于完全非对映选择性 S N 2' 环化/叔丁基裂解序列,开发了一种合成方法,用于合成具有多达四个连续立体中心的对映纯环状亚磺酰胺。证明了将获得的支架非对映特异性转化为手性 S VI衍生物,例如亚砜亚胺和磺胺类药物。
Zinc-Mediated Asymmetric Additions of Dialkylphosphine Oxides to α,β-Unsaturated Ketones and <i>N</i>-Sulfinylimines
作者:Depeng Zhao、Lijuan Mao、Dongxu Yang、Rui Wang
DOI:10.1021/jo1014917
日期:2010.10.15
A catalyst was synthesized on the basis of Trost's dinuclear catalyst characterized by working well without pyridine in the present phospha-Michael reaction Nevertheless, the presence of pyridine is still advantageous in the present system The substrate scope was successfully extended to enones employing diallyl phosphine oxide as a nucleophile Excellent yields and enantioselectivities (up to >99% ee) wine achieved for a wide scope of enones employing the catalyst under mild conditions The detailed reaction mechanism is also discussed hetein Finally. the unprecedented asymmetric additions of dialkylphosphine oxides to N-sulfinylumines were achieved by using Et2Zn as a base
KHMDS/Triglyme Cryptate as an Alternative to Phosphazene Base in Stereodivergent Pentafluoroethylation of <i>N</i>-Sulfinylimines Using HFC-125
作者:Yuji Sumii、Hiroto Iwasaki、Yamato Fujihira、Elsayed M. Mahmoud、Hiroaki Adachi、Takumi Kagawa、Dominique Cahard、Norio Shibata