365534-57-2Relevant articles and documents
Asymmetric Dieckmann Condensation towards Spirocyclic Oxindoles Catalyzed by Amino Acid-Derived Phosphonium Salts
Yu, Longhui,Liu, Jun,Wang, Hongyu,Xu, Lijun,Wu, Yufei,Zheng, Changwu,Zhao, Gang
, p. 302 - 306 (2021/11/18)
An asymmetric Dieckmann condensation towards spirocyclic oxindoles and aza-oxindoles catalyzed by amino acid-derived phosphonium salt has been developed, which expanded the applicability of asymmetric phosphonium salt catalysis in the production of 1,3-dicarbonyl compounds. This reaction is distinguished by its mild conditions (?20 °C), low catalyst loading (3–5 mol%), and broad substrate scope (25 examples). Control experiments revealed that both the catalyst‘s phosphonium skeleton and H-bonding site were required. Product transformations and a gram scale experiment were also carried out. (Figure presented.).
Reduction of pentafluorophenyl esters to the corresponding primary alcohols using sodium borohydride
Papavassilopoulou, Eleni,Christofis, Petros,Terzoglou, Despina,Moutevelis-Minakakis, Panagiota
, p. 8323 - 8325 (2008/04/13)
Primary alcohols and chiral N-protected 2-amino alcohols can be obtained in high yields from the reaction of pentafluorophenyl esters of the corresponding carboxylic acids with sodium borohydride in THF under mild conditions. This reductive method is rapid and compatible with various functional groups as well as with the most common N-protective groups Z, Boc and Fmoc.
2-(Hydroxycarbonyl)benzyl glycosides: A novel type of glycosyl donors for highly efficient β-mannopyranosylation and oligosaccharide synthesis by latent-active glycosylation
Kwan Soo Kim,Jin Hwan Kim,Yong Joo Lee,Yong Jun Lee,Park
, p. 8477 - 8481 (2007/10/03)
2-(Benzyloxycarbonyl)benzyl (BCB) glycosides were prepared by coupling of the corresponding tetraacetylglycosyl bromides and benzyl 2-(hydroxymethyl)benzoate. The BCB glycosides were converted almost quantitatively into the corresponding 2-(hydroxycarbony
Di(aromatic) compounds and their use in human and veterinary medicine and in cosmetics
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, (2008/06/13)
Di(aromatic) compounds corresponding to the following formula: STR1 in which: Ar represents either STR2 n=1 or 2 or: STR3 X represents a divalent radical, Z represents O, S or a divalent radical, and R1, R2, R3, R4 and R5 represent a hydrogen atom or various organic radicals, and the salts of the compounds of formula (I) when R1 is a carboxylic acid function. Use in human and veterinary medicine and in cosmetics.