天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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 Sieber Linker
3722-51-8

Sieber Linker synthesis

11synthesis methods
-

Yield:3722-51-8 89%

Reaction Conditions:

with ytterbium(III) trifluoromethanesulfonate nonohydrate in neat (no solvent); for 0.0833333 h;Milling;Microwave irradiation;

Steps:

General procedure for xanthone synthesis using Yb(OTf)3:

General procedure: The phenol (1.0mmol), salicylic (gentisic) acid (1.2mmol) and Yb(OTf)3 hydrate (0.1mmol) were intimately mixed in a mortar the resulting powder was subjected to MW irradiation at 200W for 5min. After completion of the reaction by monitoring by TLC, Et2O (5ml) was added and the precipitate formed filtrated under vacuum. The filtrate solution washed twice with 3% NaHCO3 (5ml) and the organic layer was dried over anhydrous MgSO4 and the solvent evaporated to dryness. The solid obtained was structurally characterized as the desired product without the need of further purification.

References:

Genovese, Salvatore;Fiorito, Serena;Specchiulli, Maria Carmela;Taddeo, Vito Alessandro;Epifano, Francesco [Tetrahedron Letters,2015,vol. 56,# 6,p. 847 - 850] Location in patent:supporting information

Sieber Linker Related Search: