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!

85446-05-5

3,6-DIBROMO-9-(OXIRAN-2-YLMETHYL)-9H-CARBAZOLE synthesis

4synthesis methods
-

Yield:85446-05-5 85.7%

Reaction Conditions:

Stage #1: 3,6-dibromo-9H-carbazolewith potassium hydroxide in N,N-dimethyl-formamide at 20; for 1 h;
Stage #2: 1,2-Epoxy-3-bromopropane in N,N-dimethyl-formamide at 20; for 3 h;

Steps:

1.a

a. Dissolve 6g 3,6-dibromocarbazole in 60mL N,N-dimethylformamide,Add 1.2g of potassium hydroxide powder, stir at room temperature for 1h,6.2g epibromohydrin was added dropwise, and reacted at room temperature for 3 hours.The reaction solution was diluted with 100 mL of water, filtered, and the solid was collected.Drying to obtain a white solid compound 1 (6 g, 85.7%).

References:

CN113402444,2021,A Location in patent:Paragraph 0072-0075