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 (R)-2-(2,6,7,8-tetrahydro-1H-indeno[5,4-b]furan-8-yl)acetic acid
1092507-02-2

(R)-2-(2,6,7,8-tetrahydro-1H-indeno[5,4-b]furan-8-yl)acetic acid synthesis

13synthesis methods
2H-Indeno[5,4-b]furan-8-acetic acid, 1,6,7,8-tetrahydro-, ethyl ester, (8S)-

1222483-21-7
0 suppliers
inquiry

(R)-2-(2,6,7,8-tetrahydro-1H-indeno[5,4-b]furan-8-yl)acetic acid

1092507-02-2
16 suppliers
inquiry

-

Yield:1092507-02-2 86%

Reaction Conditions:

Stage #1: ethyl (S)-2-(2,6,7,8-tetrahydro-1H-indeno [5,4-b]furan-8-yl)acetatewith sodium hydroxide in methanol at 30;
Stage #2: with hydrogenchloride in water;Cooling;

Steps:

5

Ethyl (85)-l,6,7,8-tetrahydro-2/f-indeno[5,4-δ]furan-8-ylacetate (100 gr, 0.406 mol) was dissolved in 800 ml methanol, sodium hydroxide was added (24.4 gr, 0.609 mol), and the reaction mixture was stirred for 2-3 hours at 3O0C to effect hydrolysis. The methanol was distilled of under vacuum, water was added, and the mixture was acidified by dropwise addition hydrochloric acid under cooling. The obtained (85)-l,2,6,7-tetrahydro-8/f-indeno[5,4-δ]furan-8-yl)acetic acid was isolated by filtration and dried under vacuum. Yield - 86 % and purity 99.8 %.

References:

WO2010/45565,2010,A1 Location in patent:Page/Page column 33

(R)-2-(2,6,7,8-tetrahydro-1H-indeno[5,4-b]furan-8-yl)acetic acid Related Search: