成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List Methyl 2-fluoro-5-hydroxybenzoate
1084801-91-1

Methyl 2-fluoro-5-hydroxybenzoate synthesis

2synthesis methods
-

Yield: 90%

Reaction Conditions:

with sulfuric acidReflux;

Steps:

24.B 24B. Methyl 2-fluoro-5-hydroxybenzo
A solution of 2-fluoro-5-hydroxybenzoic acid (1.5 g, 9.6 mmol) and conc. H2SO4 (0.050 mL, 0.92 mmol) in MeOH (10 mL) was stirred at reflux ON. After evaporation of the solvent, the residue was dissolved in 1N NaOH and extracted 3x with EtOAc. The combined extracts were dried over Na2SO4, filtered and evaporated to give 24B (1.47 g, 90% yield) as a colorless solid which was used without further purification in the following reaction.1H NMR (500MHz, CDCl3) δ 7.39 (dd, J=5.5, 3.3 Hz, 1H), 7.08 - 7.03 (m, 1H), 7.03 - 6.98 (m, 1H), 3.95 (s, 3H).

References:

BRISTOL-MYERS SQUIBB COMPANY;SMALLHEER, Joanne M.;KICK, Ellen K.;VALENTE, Meriah Neissel;HU, Carol Hui;HALPERN, Oz Scott;JUSUF, Sutjano WO2018/5336, 2018, A1 Location in patent:Page/Page column 98