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 PENTAFLUOROPHENYL TRIFLUOROMETHANESULFONATE
60129-85-3

PENTAFLUOROPHENYL TRIFLUOROMETHANESULFONATE synthesis

1synthesis methods
-

Yield:-

Reaction Conditions:

with pyridine in dichloromethane at 0 - 20; for 5 h;

Steps:

2. Preparation of Aryl Triflates

General procedure: To a solution of phenol (1.0 equiv) and pyridine (2.0 equiv) in DCM was added dropwise trifluoromethanesulfonic anhydride (1.2 equiv) at 0 °C. Then the mixture was warmed to room temperature and stirred for 5 hours. The reaction was quenched with HCl (1M). The mixture was diluted with ethyl acetate. The organic layer was washed with sat. NaHCO3, water, brine successively and concentrated under reduced pressure. The crude residue was purified with a flash column chromatography.

References:

Chen, Hui;Liao, Xuebin [Tetrahedron,2019,vol. 75,# 31,p. 4186 - 4191] Location in patent:supporting information

PENTAFLUOROPHENYL TRIFLUOROMETHANESULFONATE Related Search: