Kang, SB Ahn, EJ Kim, Y Kim, YH 2024-01-21T19:07:25Z 2024-01-21T19:07:25Z 2022-01-10 1996-12-23 0040-4039 https://pubs.kist.re.kr/handle/201004/144197 A convenient procedure for preparation of the title compound of greater than or equal to 99% ee starting from 1-(2,3-difluoro-6-nitrophenoxy)-2-propanone (3) is presented. The key reaction is the intramolecular cyclization reaction in the presence of zinc chloride. Copyright (C) 1996 Elsevier Science Ltd English PERGAMON-ELSEVIER SCIENCE LTD OPTICALLY-ACTIVE OFLOXACIN ANTIBACTERIAL ACTIVITIES CHEMISTRY YEAST A facile synthesis of (S)-(-)-7,8-difluoro-3,4-dihydro-3-methyl-2H-1,4-benzoxazine by zinc chloride assisted Mitsunobu cyclization reaction Article 10.1016/S0040-4039(97)82952-8 1 TETRAHEDRON LETTERS, v.37, no.52, pp.9317 - 9320 TETRAHEDRON LETTERS 37 52 9317 9320 scie scopus A1996VZ20200015 2-s2.0-0030599670 Chemistry, Organic Chemistry Article OPTICALLY-ACTIVE OFLOXACIN ANTIBACTERIAL ACTIVITIES CHEMISTRY YEAST