134108-76-2Relevant articles and documents
Designing enzymatic resolution of amines
Takayama, Shuichi,Lee, Shelly T.,Hung, Shang-Cheng,Wong, Chi-Huey
, p. 127 - 128 (1999)
A new strategy, utilizing IR and mass spectrometry, has been developed to design appropriate reagents and reaction conditions for enantioselective enzymatic protection of amines with readily removable protecting groups.
A method for preparing weinaweina kalland hydrochloride (by machine translation)
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Paragraph 0048; 0051-0052, (2017/11/27)
The invention discloses a method for preparing weinaweina kalland hydrochloride. The method to selectively amino protection, nucleophilic addition, nucleophilic substitution, deprotected, cyclized, reduction, into a salt by the reaction of the compound Wina carland hydrochloride. And after nuclear magnetic analysis test technology confirm its structure. It adopts the cheap and easily obtained starting materials to prepare, preparation method has advantages of simple operation, mild condition, easy industrialized production and the like, and avoids the use of heavy metal, is beneficial to the development of the oral. (by machine translation)
Enhanced rate and selectivity by carboxylate salt as a basic cocatalyst in chiral N-heterocyclic carbene-catalyzed asymmetric acylation of secondary alcohols
Kuwano, Satoru,Harada, Shingo,Kang, Bubwoong,Oriez, Raphael,Yamaoka, Yousuke,Takasu, Kiyosei,Yamada, Ken-Ichi
supporting information, p. 11485 - 11488 (2013/09/02)
The rate and enantioselectivity of chiral NHC-catalyzed asymmetric acylation of alcohols with an adjacent H-bond donor functionality are remarkably enhanced in the presence of a carboxylate cocatalyst. The degree of the enhancement is correlated with the basicity of the carboxylate. With a cocatalyst and a newly developed electron-deficient chiral NHC, kinetic resolution and desymmetrization of cyclic diols and amino alcohols were achieved with extremely high selectivity (up to s = 218 and 99% ee, respectively) at a low catalyst loading (0.5 mol %). This asymmetric acylation is characterized by a unique preference for alcohols over amines, which are not converted into amides under the reaction conditions.