cas 361342-51-0, (11bR)-2,6-Di-9-anthracenyl-4-hydroxy-dinaphtho[2,1-d:1μ,2μ-f][1,3,2]dioxaphosphepin-4-oxide

Articles about 361342-51-0Total 5 be found

Hypercrosslinking chiral Br?nsted acids into porous organic polymers for efficient heterogeneous asymmetric organosynthesis
Here, we developed a construction strategy for directly immobilizing the axially chiral phosphoric acid into hypercrosslinked polymers by a one-pot Friedel-Crafts alkylation reaction. The obtained chiral polymers have high porosity, excellent stability and tailorable catalytic centers, and display excellent activity, enantioselectivity and recyclability for asymmetric transfer hydrogenation.
Jia, Ji,Liu, Xiaoming,Ma, Si,Xia, Hong,Zhang, Yuwei,Zhang, Zhenwei
p. 25369 - 25373
(2021/12/07)

Catalytic Asymmetric Nucleophilic Addition of 3-Vinyl Indoles to Imines
The 3-vinyl indole is used as a nucleophile to react with aromatic and aliphatic imines. Chiral 3-substituted indoles bearing multiple functional groups are produced with up to 99% yield, a 98:2 E/Z ratio, and 97% ee. A possible mechanism is proposed to explain the observed stereoselectivities. This strategy provides an efficient way for the preparation of novel chiral 3-substituted indoles.
Xue, Jia-Hui,Shi, Ming,Yu, Feng,Li, Xiao-Yun,Ren, Wen,Fu, Li-Na,Guo, Qi-Xiang
supporting information
p. 3874 - 3877
(2016/08/16)

Bronsted acid-catalyzed, highly enantioselective addition of enamides to in situ-generated ortho-quinone methides: A domino approach to complex acetamidotetrahydroxanthenes
The highly enantioselective conjugate addition of enamides and enecarbamates to in situ-generated ortho-quinone methides, upon subsequent N,O-acetalization, gives rise to acetamido-substituted tetrahydroxanthenes with generally excellent enantio- and dias
Saha, Satyajit,Schneider, Christoph
supporting information
p. 2348 - 2352
(2015/02/05)

Enantioselective halogenative semi-pinacol rearrangement: Extension of substrate scope and mechanistic investigations
The present Full Paper article discloses a survey of our recent results obtained in the context of the enantioselective halogenation-initiated semi-pinacol rearrangement. Commencing with the fluorination/semi-pinacol reaction first and moving to the heavier halogens (bromine and iodine) second, the scope and limitations of the halogenative phase-transfer methodology will be discussed and compared. An extension of the fluorination/semi-pinacol reaction to the ring-expansion of five-membered allylic cyclopentanols will be also described, as well as some preliminary results on substrates prone to desymmetrization will be given. Finally, the present manuscript will culminate with a detailed mechanistic investigation of the canonical fluorination/semi-pinacol reaction. Our mechanistic discussion will be based on in situ reaction progress monitoring, complemented with substituent effect, kinetic isotopic effect and non-linear behaviour studies.
Romanov-Michailidis, Fedor,Romanova-Michaelides, Maria,Pupier, Marion,Alexakis, Alexandre
p. 5561 - 5583
(2015/03/30)

Enantioselective organocatalytic iodination-initiated Wagner-Meerwein rearrangement
The present manuscript describes a high-yielding enantioselective semipinacol transposition, initiated by an electrophilic iodination event. The title transformation makes use of the anionic phase-transfer catalysis (PTC) paradigm for chirality induction. Thus, when combined appropriately, the insoluble cationic iodinating reagent S9 and the lipophilic phosphoric acid L9 act as an efficient source of chiral iodine that performs the semipinacol transposition of strained allylic alcohols A x to β-iodo spiroketones Bx in good yields and with high levels of diastereo- and enantio-induction. The product β-iodo spiroketones could be derivatized stereospecifically and without stereoerosion, giving rise to products inaccessible directly from a semipinacol rearrangement.
Romanov-Michailidis, Fedor,Guenee, Laure,Alexakis, Alexandre
supporting information
p. 5890 - 5893
(2013/12/04)