Carbohydrate Research p. 273 - 280 (1983)
Update date:2022-07-30
Topics:
El Ashry, El Sayed H.
El Kilany, Yeldez
Abdallah, Abdallah A.
Mackawy, Kamel
The synthesis of the (2,4-dichlorophenoxy)acetylhydrazones of a number of monosaccharides is described.The reaction of the corresponding D-galactose derivative with acetic anhydride in pyridine was investigated.Penta-O-acetyl-aldehydo-D-galactose (2,4-dichlorophenoxy)acetylhydrazone was prepared by reaction of the hydrazine with penta-O-acetyl-aldehydo-D-galactose, and its 1H-n.m.r. spectrum indicated its existence as two geometric isomers.Reaction of the pentaacetate with boiling acetic anhydride caused its acetylative heterocyclization into 3-acetyl-5-<(2,4-dichlorophenoxy)methylene>-2-(1,2,3,4,5-penta-O-acetyl-D-galacto-pentinol-1-yl)-1,3,4-oxadiazoline.A generalized mechanism for the heterocylization , based on "soft" and "hard" acids and bases, is discussed.D-arabino-Hexos-2-ulose 2-(2,4-dichlorophenoxy)acetylhydrazone 1-phenylhydrazone was also prepared.
View MoreYangling Ciyuan biotech Co., Ltd.
Contact:86-15802970736
Address:2-1804, International Park Mansion, No.2, South Fengdeng Road, Lianhu District
Suzhou Ryan Pharmachem Technology Co.,Ltd
Contact:+86-0512-68780025
Address:B-301,No.2 Taishan Road,Suzhou New District,Jiangsu,P.R. China
SuZhou Ascepion Pharmaceuticals, Inc.(expird)
Contact:0512-86881668
Address:Building C,68Xingqing Road,Suzhou,China.
Contact:+33-5-34012600
Address:28 ZA des Pignès
MTT Pharma & Bio-technology Co.,Ltd(expird)
Contact:+86-21-58407925
Address:Room2019, Building C, Tomson Center, No.158, Zhang Yang Road, Shanghai, China
Doi:10.1021/jo0478959
(2005)Doi:10.1021/ja00190a036
(1989)Doi:10.1021/ja00192a043
(1989)Doi:10.1007/s11172-008-0231-4
(2008)Doi:10.1016/j.tetlet.2019.03.010
(2019)Doi:10.1021/ja9089928
(2009)
