午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

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 1,4-DIHYDROXY-2,5-DIIODOBENZENE
13064-64-7

1,4-DIHYDROXY-2,5-DIIODOBENZENE synthesis

8synthesis methods
-

Yield:-

Reaction Conditions:

with boron tribromide in dichloromethane at 20;Inert atmosphere;Schlenk technique;

Steps:



4 (0.200 g, 0.5 mmol) and bibenzyl (0.0935 g, 0.5 mmol), chosen as internal standard, were dissolved in 2 mL of dry dichloromethane. After few minutes 24 ml of boron tribromide (0.25 mmol, 0.5 equiv.) were charged into the Schlenk tube and the tube was sealed under argon with a rubber septum. The reaction mixture was stirred at room temperature. The GC-MS analysis of the samples withdrawn from the reaction mixture allowed to follow the disappearance of the dimethoxy substrate and the formation of the corresponding monodemethylated product, 2,5-diiodo-4-methoxy-phenol (5) as well as that of the fully dealkylated product, 1,4-dihydroxy-2,5-diiodo-benzene (3).

References:

Pasquini, Chiara;Coniglio, Alessandra;Bassetti, Mauro [Tetrahedron Letters,2012,vol. 53,# 46,p. 6191 - 6194,4] Location in patent:supporting information