3205-18-3Relevant academic research and scientific papers
Noncovalently Functionalized Commodity Polymers as Tailor-Made Additives for Stereoselective Crystallization
Wan, Xinhua,Wang, Zhaoxu,Ye, Xichong,Zhang, Jie
supporting information, p. 20243 - 20248 (2021/08/09)
Stereoselective inhibition of the nucleation and crystal growth of one enantiomer aided by “tailor-made” polymeric additives is an efficient method to obtain enantiopure compounds. However, the conventional preparation of polymeric additives from chiral monomers are laborious and limited in structures, which impedes their rapid optimization and applicability. Herein, we report a “plug-and-play” strategy to facilitate synthesis by using commercially available achiral polymers as the platform to attach various chiral small molecules as the recognition side-chains through non-covalent interactions. A library of supramolecular polymers made up of two vinyl polymers and six small molecules were applied with seeds in the selective crystallization of seven racemates in different solvents. They showed good to excellent stereoselectivity in yielding crystals with high enantiomeric purities in conglomerates and racemic compound forming systems. This convenient, low-cost modular synthesis strategy of polymeric additives will allow for high-efficient, economical resolution of various racemates on different scales.
Recyclable mitsunobu reagents: Catalytic mitsunobu reactions with an iron catalyst and atmospheric oxygen
Hirose, Daisuke,Taniguchi, Tsuyoshi,Ishibashi, Hiroyuki
supporting information, p. 4613 - 4617 (2013/06/04)
Aerobic recycling: A catalytic amount of a hydrazine reagent is sufficient to promote Mitsunobu reactions in the presence of triphenylphosphine, an iron catalyst, and air. The active form of the catalyst, an azo species, can be readily generated by iron-c
Chiral porphyrin dimer with a macrocyclic cavity for intercalation of aromatic guests
Ema, Tadashi,Ura, Norichika,Eguchi, Katsuya,Ise, Yuhei,Sakai, Takashi
supporting information; experimental part, p. 6090 - 6092 (2011/08/02)
Chiral diporphyrin receptor 1, which has a macrocyclic cavity to sandwich aromatic guest molecules via double π-π stacking interactions, enabled the naked-eye detection of an aromatic explosive as well as chiral discrimination in NMR.
DESIGN OF STEREOSPECIFIC INHIBITORS FOR CRYSTAL DISSOLUTION
Shimon, L. J. W.,Zbaida, D.,Addadi, L.,Leiserowitz, L.,Lahav, M.
, p. 199 - 222 (2007/10/02)
A new class of monomeric and polymeric crystal dissolution inhibitors has been prepared taking into consideration the packing arrangements and the morphologies of organic crystals.The efficiency of these inhibitors has been demonstrated by comparative morphological studies of α-glycine and by the kinetic resolution of the racemic conglomerates of his*HCl*H2O, threonine, glu*HCl, and 2,4-sec-phenetyl-3,5-dinitrobenzoate.
