4513-77-3Relevant academic research and scientific papers
Synthesis and olfactory evaluation of (4afl*,8afl*)-1,1,8a- trimethyl- Decahydronaphthalen-4a-ol: A cis -decalol intersection structure of (-)-patchoulol and (5fl*,6S*)-1,1,6-trimethylspiro[4.5]decan-6-ol
Jahnke, Astrid,Burschka, Christian,Tacke, Reinhold,Kraft, Philip
, p. 62 - 68 (2009)
Superposition analysis of (-)-patchoulol (1) and the spi- rocyclic patchouli odorant (5R*,6S*)-1,1,6-trmiethylspiro[4.5]de- can-6-ol (3) suggested the intersection structure (4a5*,8a5*)- 1,1,8a-trimethyldecahydronaphthalen-4a-ol (4) as potential patchouli
Generation and trapping of electron-deficient 1,2-cyclohexadienes. Unexpected hetero-Diels-Alder reactivity
Wang, Baolei,Constantin, Marius-Georgian,Singh, Simarpreet,Zhou, Yuqiao,Davis, Rebecca L.,West
, p. 399 - 405 (2021/01/29)
Keto-substituted 1,2-cyclohexadienes were generated by base-mediated (KOt-Bu) elimination, and found to dimerize via an unprecedented formal hetero-Diels-Alder process, followed by hydration. These highly reactive cyclic allene intermediates were also tra
5-(Cyano)dibenzothiophenium Triflate: A Sulfur-Based Reagent for Electrophilic Cyanation and Cyanocyclizations
Li, Xiangdong,Golz, Christopher,Alcarazo, Manuel
supporting information, p. 9496 - 9500 (2019/06/27)
The synthesis of 5-(cyano)dibenzothiophenium triflate 9, prepared by activation of dibenzo[b,d]thiophene-5-oxide with Tf2O and subsequent reaction with TMSCN is reported, and its reactivity as electrophilic cyanation reagent evaluated. The scalable preparation, easy handling and broad substrate scope of the electrophilic cyanation promoted by 9, which includes amines, thiols, silyl enol ethers, alkenes, electron rich (hetero)arenes and polyaromatic hydrocarbons, illustrate the synthetic potential of this reagent. Importantly, Lewis acid activation of the reagent is not required for the transfer process. We additionally report herein biomimetic cyanocyclization cascade reactions, which are not promoted by typical electrophilic cyanation reagents, demonstrating the superior ability of 9 to trigger challenging transformations.
SUBSTITUTED IMIDAZOLIUM SULFURANES AND THEIR USE
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Page/Page column 15; 17, (2017/01/26)
The present invention refers to substituted imidazolium sulfuranes, the use thereof for the transfer of a -CN group or an alkyne group.
Dihalo(imidazolium)sulfuranes: A Versatile Platform for the Synthesis of New Electrophilic Group-Transfer Reagents
Talavera, Garazi,Pe?a, Javier,Alcarazo, Manuel
supporting information, p. 8704 - 8707 (2015/07/27)
The syntheses of imidazolium thiocyanates and imidazolium thioalkynes from dihalo(imidazolium) sulfuranes are reported and their reactivities as CN+ and R-CC+ synthons evaluated, respectively. The easy and scalable preparation of these electrophilic reagents, their operationally simple handling, broad substrate scope, and functional group tolerance clearly illustrate the potential of these species to become a reference for the direct electrophilic cyanation and alkynylation of organic substrates.
An Alternative to the Classical α-Arylation: The Transfer of an Intact 2-Iodoaryl from ArI(O2CCF3)2
Jia, Zhiyu,Gálvez, Erik,Sebastián, Rosa María,Pleixats, Roser,álvarez-Larena, ángel,Martin, Eddy,Vallribera, Adelina,Shafir, Alexandr
, p. 11298 - 11301 (2016/02/19)
The α-arylation of carbonyl compounds is generally accomplished under basic conditions, both under metal catalysis and via aryl transfer from the diaryl λ3-iodanes. Here, we describe an alternative metal-free α-arylation using ArI(O2CCF3)2 as the source of a 2-iodoaryl group. The reaction is applicable to activated ketones, such as α-cyanoketones, and works with substituted aryliodanes. This formal C-H functionalization reaction is thought to proceed through a [3,3] rearrangement of an iodonium enolate. The final α-(2-iodoaryl)ketones are versatile synthetic building blocks.
Cytochrome P450 catalyzed oxidative hydroxylation of achiral organic compounds with simultaneous creation of two chirality centers in a single C-H activation step
Roiban, Gheorghe-Doru,Agudo, Ruben,Reetz, Manfred T.
supporting information, p. 8659 - 8663 (2014/08/18)
Regio- and stereoselective oxidative hydroxylation of achiral or chiral organic compounds mediated by synthetic reagents, catalysts, or enzymes generally leads to the formation of one new chiral center that appears in the respective enantiomeric or diastereomeric alcohols. By contrast, when subjecting appropriate achiral compounds to this type of C-H activation, the simultaneous creation of two chiral centers with a defined relative and absolute configuration may result, provided that control of the regio-, diastereo-, and enantioselectivity is ensured. The present study demonstrates that such control is possible by using wild type or mutant forms of the monooxygenase cytochrome P450 BM3 as catalysts in the oxidative hydroxylation of methylcyclohexane and seven other monosubstituted cyclohexane derivatives.
A new and facile synthesis of methyl 3-amino-4,5,6,7-tetrahydrobenzo[b] thiophene-2-carboxylate
Tenora, Luká?,Buchlovi?, Marian,Man, Stanislav,Potá?ek, Milan
supporting information; experimental part, p. 401 - 403 (2011/02/28)
A four-step synthesis of methyl 3-amino-4,5,6,7-tetrahydrobenzo[b] thiophene-2-carboxylate from commercially available starting materials is presented.
An approach to azabicyclo[ n.3.1]alkanes by double mannich reaction
Mityuk, Andrey P.,Denisenko, Aleksandr V.,Dacenko, Oleksandr P.,Grygorenko, Oleksandr O.,Mykhailiuk, Pavel K.,Volochnyuk, Dmitriy M.,Shishkin, Oleg V.,Tolmachev, Andrey A.
experimental part, p. 493 - 497 (2010/04/26)
Chlorotrimethylsilane-promoted double Mannich annulation of ketones using N,N-bis(methoxymethyl)benzylamine has been explored. It has been shown that the structure of the substrate drastically influenced the outcome of the reaction. The method allows azabicyclo[n.3.1]alkane derivatives (n=2-5) to be obtained in good yields. Georg Thieme Verlag Stuttgart New York.
A modified Robinson annulation process to α,α-disubstituted-β,γ-unsaturated cyclohexanone system. Application to the total synthesis of nanaimoal
Liu, Hsing-Jang,Ly, Tai Wei,Tai, Chia-Liang,Wu, Jen-Dar,Liang, Jinn-Kwei,Guo, Jiunn-Cheh,Tseng, Nai-Wen,Shia, Kak-Shan
, p. 1209 - 1226 (2007/10/03)
4-Cyano-2-cyclohexenones were found to be susceptible to reductive alkylation reactions, giving the corresponding 2,2-disubstituted-3-cyclohexenone derivatives in a completely regioselective manner. This newly developed methodology has been successfully applied towards the total synthesis, in racemic form, of the marine natural product nanaimoal.
