A new and efficient method for the synthesis of Ulipristal acetate
β Scribed by Cheng, Xu; Li, Xiaocen; Duan, Yanjun; Yu, Yongguo; Hai, Li; Wu, Yong
- Book ID
- 121814553
- Publisher
- Elsevier Science
- Year
- 2014
- Tongue
- English
- Weight
- 868 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0039-128X
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## Abstract magnified image __cis__βFused bicyclic acetals were obtained from the unusual cyclization reaction between diols and dihydropyran. Furothiopyran, substituted pyranopyrans, and pyranooxepine and pyranobenzoxepine compounds were obtained with high diastereoselectivity and __cis__βdiaster
Pyruvic acid acetals (l-carboxyethylidene acetals) linked to aldohexopyranosyl residues are known to occur in a number of polysaccharides. These include agarl, and exocellular2 and capsular polysaccharides'. Pyruvic acid is most often linked to O-4 and O-6 of such hexoses as o-glucose, D-mannose, D-