Catalytic asymmetric acyl halide-aldehyde cycloconde-nsation reactions of substituted ketenes. Nelson, S. G,Zhu, C,Shen, X. Journal of the American Chemical Society . 2004Nelson S G,Zhu C,Shen X Q. Catalytic Asymmetric Acyl Halide-Aldehyde Cyclocondensation Reactions of Substituted Ketenes[J]...
acyl halidealdehydeenantioenriched β-lactonesoxetanoneswaste disposalS )-Valinol Triethylamine Trifluoromethanesulfonic anhydride ( S )- N -Trifluoromethylsulfonyl-2-isopropylaziridine Benzylamine (2 S ,6 S )-4-Benzyl-1,7-bis(trifluoromethylsulfonyl)-2,6-disopropyll-1,4,7-triazaheptane Disio...
Nelson, S.G.; Wan, Z. Catalytic Asymmetric Propionate Aldol Reactions via Acyl Halide-Aldehyde Cyclocondensations. Org. Lett. 2000, 2, 1883-1886.Catalytic Asymmetric Propionate Aldol Reactions via Acyl Halide−Aldehyde Cyclocondensations - Nelson, Wan () Citation Context ...2 C (5) +0.07 ...
Molecules containing a chiral 1,2-diol unit are synthesized from reactions between aldehydes and N-acyl selones. A chilled N-acyl selone is reacted with a Lewis acid such as TiCl 4 and mixed with a tertiary amine such as diisopropylethylamine to generate an enolate solution. Upon further ...
(equation10).54The principal adducts have an all-synarrangement of β′-hydroxy, γ-vinyl, and δ-methyl substituents. The stereogenic center at theδcarbon of the allylic halide determines the configuration of the stereocenters created at the γ and β′ positions of the products. The ...
This proof-of-concept study has established a foundation for the Haber-independent synthesis of fritenolides from 3A5F; in principle, both long-chain alkyl groups can be installed through olefination of the aldehyde (q.v) and exchange of the acyl group (Pham et al., 2019b; Sadiq et al....
b) cleaving said resin bound 2-substituted-3-aminoimidazo[1,2-a]pyridine substrate from said resin by reacting said substrate with an acyl halide having the formula R 2 COX; X is chlorine or bromine, to form a said 3-acylamino imidazo[1,2-a]pyridine.Jian Chen...
As for this invention, aromatic aldehyde or the aromatic aldehyde blend xylene being the method of converting to the reaction product which in the reaction medium which is not included is aromatic acyl halide or the aromatic acyl halide blend, halogen and contact obtaining aromatic aldehyde or the...
Catalyzed asymmetric acyl halide-aldehyde cyclocondensation (AAC) reactions have been developed as catalyzed direct aldol reaction variants. The AAC reactions utilize acyl halides (acetyl bromide or propionyl bromide) as the enolate surrogate, which generate ketene was realized.*; *Please refer to ...
As for this invention, aromatic aldehyde or the aromatic aldehyde blend xylene being the method of converting to the reaction product which in the reaction medium which is not included is aromatic acyl halide or the aromatic acyl halide blend, halogen and contact obtaining aromatic aldehyde or the...