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 2,3-DIAMINOTOLUENE
2687-25-4

2,3-DIAMINOTOLUENE synthesis

11synthesis methods
-

Yield:2687-25-4 97%

Reaction Conditions:

with hydrogen;palladium 10% on activated carbon in ethanol at 20; under 760.051 Torr; for 4 h;

Steps:

176 Reference Example 176; 3-Methylbenzene-1,2-diamine (I-176)
4.0 g of 10 % palladium-carbon catalyst (water content, 51.5 %) was added to ethanol (200 ml) solution of 8.50 g (55.9 mmol) of 2-methyl-6-nitroaniline, and the resulting mixture was stirred under atmospheric pressure hydrogen at room temperature for 4 hours. The catalyst was removed through filtration, and the solvent was evaporated from the filtrate to obtain 6.64 g (97 %) of a crude product of the entitled compound as a black crystal. This compound was directly used in the next reaction.1H-NMR(CDCl3)δ: 2.22(3H, s), 3.35-3.40(4H, m), 6.62-6.68(3H, m).

References:

DAIICHI PHARMACEUTICAL CO., LTD. EP1479681, 2004, A1 Location in patent:Page 110

FullText

2,3-DIAMINOTOLUENE Related Search: