CERIUM (IV) MEDIATED OXIDATIVE DIMERIZATION OF 3-OXOACID ANILIDES AND THEIR CYCLIZATIONS
作者:B. Zaleska、S. Lis
DOI:10.1081/scc-100000198
日期:2001.1
Investigation of the behavior of several anilides of 3- oxoacids in oxidation reaction with ceric ammonium nitrate has shown that selective intermolecular C-C bond formation, which led to their dimers, is typical of these compounds. These dimeric species were cyclized in two routes, A and B, leading to 3-[2′-(1′-aniline-3′-oxo)-indene]-quinoline-2-on derivatives with HCl(g) (Route A), and with application
对 3-含氧酸的几种苯胺在与硝酸铈铵的氧化反应中的行为的研究表明,选择性分子间 CC 键形成,导致它们的二聚体,是这些化合物的典型特征。这些二聚体在两条路线 A 和 B 中环化,产生 3-[2'-(1'-aniline-3'-oxo)-indene]-quinoline-2-on 衍生物与 HCl(g)(路线 A ),并使用 H2SO4 作为环化剂,得到呋喃-3,4-二羧酸衍生物(路线 B)。
Selectfluor-Promoted Intramolecular N–S Bond Formation of α-Carbamoyl Ketene Dithioacetals in the Presence of Water: Synthesis of Multifunctionalized Isothiazolones
作者:Zheng Liu、Youkun Wang、Jianfeng Huo、Xiao-Jun Li、Shengnan Li、Xiaoning Song
DOI:10.1021/acs.joc.0c03036
日期:2021.4.16
annulation of α-carbamoyl ketenedithioacetals has been developed in the presence of H2O and metal-free conditions. Notably, the experimental results reveal that H2O was crucial to the formation of new N–S bonds and the elimination of alkyl group from the sulfur atom. This protocol provides readily prepared substrates and possesses good functional group tolerance, mild reaction conditions, and operational
A highly enantioselective Darzens reaction between diazoacetamides and aldehydes catalyzed by a (+)-pinanediol–Ti(OiPr)4 system
作者:Gang Liu、Daming Zhang、Jian Li、Guangyang Xu、Jiangtao Sun
DOI:10.1039/c2ob27179f
日期:——
A highly efficient enantioselective Darzens reaction of aldehydes with diazoacetamides catalyzed by a (+)-pinanediol–Ti(OiPr)4 system has been developed. The cis-glycidic amides were obtained in high yields and with moderate to excellent enantioselectivity (up to 99%).
已经开发了由(+)-ane二醇-Ti(O i Pr)4系统催化的醛与重氮乙酰胺的高效对映选择性Darzens反应。所述CIS以高收率得到,并与中度至良好的对映选择性(高达99%) -缩水甘油酰胺。
Synthesis of chiral lactams via asymmetric hydrogenation of α,β-unsaturated nitriles
作者:Duanyang Kong、Meina Li、Guofu Zi、Guohua Hou
DOI:10.1039/c6ob00310a
日期:——
A highly efficient Rh-catalyzed enantioselective hydrogenation of α,β-unsaturated nitriles containing ester/amide groups has been developed. Under mild conditions, with a complex of rhodium and (S,S)-f-spiroPhos as the catalyst, a variety of α,β-unsaturated nitriles bearing an ester or amide group were successfully hydrogenated to the corresponding chiral nitriles with excellent enantioselectivities
Enamines in solid-phase: synthesis and reactivity towards electrophiles
作者:Fernando Aznar、Carlos Valdés、Marı́a-Paz Cabal
DOI:10.1016/s0040-4039(00)00946-1
日期:2000.7
are synthesized in solid-phase by amination of terminal acetylenes with a secondary amine attached to Wang resin in a process catalyzed by mercury(II) acetate. The enamines obtained react with electrophiles such as isocyanates and nitroolefins to give rise to the expected addition products, which can be released from the resin by hydrolysis of the enamine under mild acidic conditions.