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61.45

Kỹ thuật hóa học

Nguyễn Lê Tuấn, Đào Đức Thiện, Nguyễn Tiến Đạt, Nguyễn Quốc Vượng(1), Trần Văn Sung

Nghiên cứu tổng hợp Levofloxacin làm thuốc kháng sinh từ chất chìa khóa (S)-7,8-Difluoro-3-Methyl-3,4-Dihydro-2H-Benzo[B][1,4]Oxazine

Synthesis of antibiotical levofloxacin from the key compound (S)-7,8-difluoro-3-methyl-3,4-dihydro-2H-benzo[B][1,4]oxazine (part 2)

TC Hóa học

2011

6

752-755

0866-7144

Levofloxacine, the third generation of fluoroquinolon antibiotic drug, was synthesized from chiral reagent (S)-7,8-difluoro-3-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine 1 in 3 steps. Step 1 is the synthesis of (3S)-9, 10-difloro-3-methyl-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid ethyl ester 4; step 2 is the synthesis of (3S)9,10-difloro-3-methyl-7-oxo-2,3-dihydro-7H-pyrido[I,2,3-de][1 ,4]benzoxazine-6-carboxylic acid 5. The final step is a nuclear aromatic substitution at C-10 by methyl piperazine to give levofloxacin 7. The structure of the obtained compounds have been confirmed by JR, IH, I3C-NMR, MS spectra, and [alpha]D. The chiral purity of obtained levofloxacin 7 was identified by HPLC method.

TTKHCNQG, CVv14