Results 121 to 130 of about 26,606 (255)

Synthesis of S‐Linked Glycoconjugates of Monosaccharides and Levoglucosenone Derivatives Through Photoinduced Thiol–Ene Reaction Mediated by 4CzIPN and Its Water Soluble Analog

European Journal of Organic Chemistry, EarlyView.
Visible‐light thiol–ene reaction mediated by 4CzIPN enables access to hydrolytically stable S‐linked glycoconjugates from levoglucosenone‐derived thiols (Y = 91% to quant. d.r. = up to >95:5) and conventional thio‐sugars (Y = 80% to quant. d.r. = up to >95:5).
Lorenzo Poletti, Francesco Riina, Daniele Ragno, Carmela De Risi, Alessandro Massi, Graziano Di Carmine   +5 more
wiley   +1 more source

Highly diastereoselective silyl-modified Sakurai multicomponent reaction

, 2006
Highly diastereoselective silyl-modified Sakurai multicomponent ...
Marko, Istvan, Pospisil, Jiri, Kumamoto, Takuya, Jioi Pospisil, Takuya Kumamoto, Istvan E. Marko   +5 more
core   +1 more source

Unified Approach for the Synthesis of Close Analogues of Reverse‐Prenylated Hexahydropyrrolo Indole Alkaloids

European Journal of Organic Chemistry, EarlyView.
A simple, modular, and unified strategy for the synthesis of reverse‐prenylated hexahydropyrrolo indole alkaloids has been developed. An unusual retrosynthetic disconnection allows for the late introduction of a side chain, which distinguishes many members of this class of natural products.
Daniel Schmelzer, Carina S. Wencke, Christian B. W. Stark   +2 more
wiley   +1 more source

Diastereoselective Addition of Alcohol to Diastereotopic Silylenes

, 2016
The successful example of diastereoselective addition of alcohol to diastereotopic silylenes is ...
Takanobu Sanji (2037262), Hideki Sakurai (2515429), Hideyuki Fujiyama (2515423), Kaname Yoshida (1801507)   +3 more
core   +1 more source

Nucleophilic Reactions of Cyclobutenones and the Related 4,4‐Dichlorocyclobutenone Derivatives

European Journal of Organic Chemistry, EarlyView.
Cyclobutenone derivates and their 4,4‐dichloro counterparts have an uninterrupted attention as useful synthons in the synthesis of complex organic molecules. Their nucleophilic reactions remain underexplored. This review brings attention to these reactions, whose outcome is not straightforward.
Sarah J. Wright, Muhluri H. Mthombeni, Songeziwe Ntsimango   +2 more
wiley   +1 more source

Emergent Atropisomerism Through Diels–Alder Reactions of Vinylallenes

European Journal of Organic Chemistry, EarlyView.
Cycloaddition‐induced geometric reorganization transforms achiral vinylallenes into atropisomeric styrenes. Conformational flexibility governs atropisomerization barriers, thermodynamic preferences, and configurational stability. Atropisomeric styrenes remain comparatively underdeveloped because configurational stability about the C(sp2)C(sp2) bond is
Kusum Sai, Asja A. Kroeger, Michelle L. Coote, Michael S. Sherburn   +3 more
wiley   +1 more source

A General Stereochemical Model for Grignard Additions to α‐Alkoxy Nitrones: Density Functional Theory Evidence for an Intrinsic α‐Chelation‐Controlled Pathway

European Journal of Organic Chemistry, EarlyView.
A comprehensive DFT conformational study of Grignard additions to α‐alkoxy nitrones reveals that the reaction proceeds through a dinuclear α‐chelated transition structure in which the nitrone oxygen coordinates two magnesium centers. Other common additives, such as zinc dichloride, boron trifluoride, and dimethylaluminum chloride, were also studied ...
Manuel Pedrón, Tomás Tejero, Pedro Merino   +2 more
wiley   +1 more source

Nucleophilic Vinylic Substitution of 2,2‐Diaryl‐Substituted 1‐Chlorovinyl p‐Tolyl Sulfoxides With Alkynyllithiums

European Journal of Organic Chemistry, EarlyView.
A nucleophilic vinylic substitution (SNV) reaction of 1‐chlorovinyl p‐tolyl sulfoxides with alkynyllithiums provides a direct route to conjugated enynes. The transformation proceeds with stereochemical retention. Experimental studies and DFT calculations support a concerted SNVπ mechanism. Nucleophilic vinylic substitution (SNV) reactions of 2,2‐diaryl‐
Tsutomu Kimura, Saya Yamamoto, Chie Takase, Yuka Nishimura, Koto Sekiguchi, Tsuyoshi Satoh   +5 more
wiley   +1 more source

Unsaturated biobased polyesters from bicyclic α‐pinene‐based diols

Polymer International, EarlyView.
We present the synthesis of four biosourced unsaturated polyesters made from chiral terpene‐based diols and esters of renewable diacids. The resulting materials harbor a bicyclic pinene ring in their backbones which leads to enhanced thermal properties while still conferring susceptibility to enzyme hydrolysis for chains having a cis alkene.
Ganapathy Ranjani, Shengwei Sun, Erik Sundén, Diana Bernin, Per‐Olof Syrén   +4 more
wiley   +1 more source

Modular Synthesis of α‐Quaternary Pyrrolines by Pyridoxal‐Catalyzed Sequential Reactions With Precise Chirality Relay

Transformative Chemistry, EarlyView.
Direct asymmetric α‐C conjugate addition of aminoacetonitrile enabled by carbonyl/iminium double activation, together with subsequent electrophilic functionalization, offers a one‐pot, two‐step modular strategy for synthesizing chiral α‐quaternary pyrrolines with precise chirality relay and high structural diversity.
Xingdie Yang, Pengwei Ji, Liang Liu, Tongyin Chen, Siqi Liu, Wen‐Wen Chen, Baoguo Zhao   +6 more
wiley   +1 more source