36169-68-3Relevant articles and documents
Catalytic Environmentally Friendly Protocol for Achmatowicz Rearrangement
Li, Zhilong,Tong, Rongbiao
, p. 4847 - 4855 (2016)
The increasing interest in Achmatowicz rearrangement in organic synthesis calls for a more environmentally friendly protocol since the most popular oxidants m-CPBA and NBS produced stoichiometric organic side product (m-chlorobenzoic acid or succinimide). Mechanism-guided analysis enables us to develop a new catalytic method (Oxone/KBr) for AchR in excellent yield with K2SO4 as the only side product, which greatly facilitates the purification. This protocol was integrated with other transformations, leading to a rapid access to the highly functionalized dihydropyranones.
Synthesis method of polysubstituted 3-hydroxy-2-pyranone
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Paragraph 0047; 0063, (2022/01/12)
The present invention relates to a polysubstituted 3-hydroxy-2-pyranone synthesis method, which comprises the steps below, S1 of formula (I.) compound by Achmatowicz rearrangement reaction, to give a compound of formula (II.); S2 of formula (II.) compound
Divergent Synthesis of Dihydropyranone Stereoisomers via N-Heterocyclic Carbene Catalysis
Zhao, Changgui,Wang, Jian
, p. 1668 - 1672 (2019/02/19)
We recently developed a novel chiral N-heterocyclic carbene (NHC) catalyzed dynamic kinetic enantioselective acylation (DKEA) and dynamic kinetic diastereoselective acylation (DKDA) of Achmatowicz rearrangement products to generate useful intermediates for the further synthesis of carbohydrates. In this update, we describe a divergent NHC catalytic strategy for the stereoselective preparation of all four isomers starting from a common racemic precursor. The present report provides easy access to diverse optically pure dihydropyranones. (Figure presented.).
Two catalytic protocols for Achmatowicz rearrangement using cyclic diacyl peroxides as oxidants
Wei, Congyin,Zhao, Rong,Shen, Zhihong,Chang, Denghu,Shi, Lei
supporting information, p. 5566 - 5569 (2018/08/17)
In situ generated bromonium-catalyzed and visible-light photocatalytic Achmatowicz rearrangements of furfuryl alcohols using cyclic diacyl peroxides as oxidants are described. Both protocols feature broad substrate scope, excellent functional group tolera