2510-03-4Relevant academic research and scientific papers
Asymmetric organocatalytic vinylogous Michael addition triggered triple-cascade reactions of 2-hydroxycinnamaldehydes and vinylogous nucleophiles: construction of benzofused oxabicyclo[3.3.1]nonane scaffolds
Wu, Hui-Chun,Wang, Chen,Chen, Ying-Han,Liu, Yan-Kai
supporting information, p. 1762 - 1765 (2021/02/27)
An organocatalytic vinylogous Michael addition triggered triple-cascade reaction has been developed. 2-Hydroxycinnamaldehydes worked under iminium activation with either acyclic or cyclic ketone-derived α,α-dicyanoalkenes, yielding the benzofused oxabicyclo[3.3.1]nonanes bearing one quaternary stereocenter with excellent stereoselectivities.
Functional Group Interconversion of Alkylidenemalononitriles to Primary Alcohols by a Cooperative Redox Operation
Emmetiere, Fabien,Grenning, Alexander J.
, p. 3077 - 3085 (2020/08/10)
Functional group interconversions are essential chemical processes enabling synthesis. In this report, we describe a strategy to convert alkylidenemalononitriles into primary alcohols in one step. The reaction relies on a choreographed redox process invol
"on Water" Direct Catalytic Vinylogous Aldol Reaction of Silyl Glyoxylates
Pan, Hong,Han, Man-Yi,Li, Pinhua,Wang, Lei
, p. 14281 - 14290 (2019/11/03)
The unique reactivity of water in the direct catalytic vinylogous aldol reaction of silyl glyoxylates is reported. With the hydrogen-bonding networks from water, the unfavorable homogeneous reactions in organic solvents were severely suppressed, and the "
Organocatalytic asymmetric vinylogous 1,4-addition of α,α-Dicyanoolefins to chalcones under a bio-based reaction media: Discovery of new Michael adducts with antiplasmodial activity
Martelli, Lorena S.R.,Vieira, Lucas C.C.,Paix?o, Márcio W.,Zukerman-Schpector, Julio,de Souza, Juliana O.,Aguiar, Anna Caroline C.,Oliva, Glaucius,Guido, Rafael V.C.,Corrêa, Arlene G.
supporting information, p. 3530 - 3542 (2019/05/24)
The organocatalysed asymmetric vinylogous Michael addition of α,α-dicyanoolefins to α,β-unsaturated aldehydes and ketones have been reported in the last decade, however, chalcones have been poorly explored. Moreover, a considerable part of the publications in this theme still employs undesirable solvents, such as toluene and THF, with concerns related to health and environmental safety. We report herein the use of a bifunctional catalyst derived from a Cinchona alkaloid to perform the enantio- and diastereoselective Michael addition of α,α-dicyanoolefins to chalcones using 2-MeTHF as solvent. The Michael adducts were obtained in moderate to good yields and were evaluated for their antiplasmodial and cytotoxic activity.
Synthesis of 2-cyanoacrylamides through Pd-catalyzed monohydration of methylenemalononitriles
Liu, Yingtian,Dang, Xinxin,He, Yu,Bai, Hudong,Chen, Xuehong,Li, Jun-Long,Fan, Junting,Jiang, Hezhong,Li, Jiahong
, p. 662 - 671 (2019/02/20)
A straightforward and efficient method has been developed for the synthesis of 2-cyanoacrylamide from 2-methylenemalononitriles through monohydration. A series of methylenemalononitriles underwent the reaction under mild and simple reaction conditions wit
Synthesis of Novel Pterocarpen Analogues via [3?+?2] Coupling-Elimination Cascade of α,α-Dicyanoolefins with Quinone Monoimines
Chen, Hui,Zhao, Sihan,Cheng, Shaobing,Dai, Xingjie,Xu, Xiaoying,Yuan, Weicheng,Zhang, Xiaomei
, p. 1672 - 1683 (2019/04/08)
By employing triethylamine as a catalyst, [3?+?2] coupling-elimination cascade of α,α-dicyanoolefins with quinone monoimines was realized. The reactions afforded various novel pterocarpen analogues with generally moderate yields (up to 75%). In addition, a plausible reaction mechanism was proposed.
A high enantio-selectivity containing cyclohexenone tricyclic compound, preparation method and application thereof
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Paragraph 0015, (2019/06/13)
A high enantio-selectivity containing cyclohexenone tricyclic compound, preparation method and application thereof, belongs to the organic chemical asymmetric synthesis technology field, the structural formula is as follows: , Wherein R=phenyl, 2 - naphth
Assembly of Terpenoid Cores by a Simple, Tunable Strategy
Lahtigui, Ouidad,Emmetiere, Fabien,Zhang, Wei,Jirmo, Liban,Toledo-Roy, Samira,Hershberger, John C.,Macho, Jocelyn M.,Grenning, Alexander J.
supporting information, p. 15792 - 15796 (2016/12/16)
Oxygenated, polycyclic terpenoid natural products have important biological activities. Although total synthesis of such terpenes is widely studied, synthetic strategies that allow for controlled placement of oxygen atoms and other functionality remains a challenge. Herein, we present a simple, scalable, and tunable synthetic strategy to assemble terpenoid-like polycycloalkanes from cycloalkanones, malononitrile, and allylic electrophiles, abundantly available reagent classes.
Organocatalyzed asymmetric 1,6-conjugate addition of para-quinone methides with dicyanoolefins
Li, Xuanyi,Xu, Xiuyan,Wei, Weiwei,Lin, Aijun,Yao, Hequan
supporting information, p. 428 - 431 (2016/02/19)
A chiral thiourea catalyzed asymmetric 1,6-conjugate addition of para-quinone methides with dicyanoolefins has been developed. The reaction provided an efficient approach to the synthesis of chiral diarylmethine skeletons in good yields (up to 99% yield) with high diastereo- and enantioselectivity (>20:1 dr and up to 99.5:0.5 er), also on a gram scale. The preliminary mechanistic study showed that the remote stereocontrol was achieved through intermolecular hydrogen-bond interaction between the chiral thiourea catalyst and the para-quinone methides directly for the first time.
Dihydroazulene/Vinylheptafulvene Photoswitch: Ultrafast Back Reaction Induced by Dihydronaphthalene Annulation
Broman, Soren Lindbaek,Kushnir, Oleg,Rosenberg, Martin,Kadziola, Anders,Daub, Joerg,Nielsen, Mogens Brondsted
, p. 4119 - 4130 (2015/06/30)
The vinylheptafulvene (VHF) to dihydroazulene (DHA) electrocyclization is known to proceed from an s-cis conformation of VHF and cannot occur from the more stable s-trans conformation. Locking the VHF in the s-cis conformation by the introduction of a dih
