カサシマ ヨシオ   YOSHIO KASASHIMA
  笠嶋 義夫
   所属   千葉工業大学  創造工学部 教育センター(創造工学部)
   職種   教授
言語種別 英語
発行・発表の年月 2020/01/07
形態種別 学術雑誌
査読 査読あり
標題 Attrition-Enhanced Deracemization of Axially Chiral Nicotinamides
執筆形態 共著
掲載誌名 European Journal of Organic Chemistry
掲載区分国外
出版社・発行元 John Wiley & Sons, Inc.
巻・号・頁 2020(8),pp.1001-1005
総ページ数 5
著者・共著者 Hiroki Ishikawa, Kazuma Ban, Naohiro Uemura, Yasushi Yoshida, Takashi Mino, Yoshio Kasashima, Masami Sakamoto
概要 Attrition-enhanced deracemization of two axially chiral nicotinamides, crystallizing as a conglomerate of a P21 crystal system, was performed. N,N-Dialkylnicotinamides with substituents on the 2- and 4-positions of the pyridine ring exhibited stable axial chirality due to rotationally restricted scaffolds for the Ar–C(=O)N bond. Crystallization of the racemic mixtures from the melt or attrition-enhanced deracemization
led to the chiral breaking of symmetry to give 95–96 % ee of enantiomorphic crystals.
DOI 10.1002/ejoc.201901826
ISSN 1099-0690