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Benzene, 1-methoxy-2-(1-propynyl)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

66021-98-5

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66021-98-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66021-98-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,0,2 and 1 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 66021-98:
(7*6)+(6*6)+(5*0)+(4*2)+(3*1)+(2*9)+(1*8)=115
115 % 10 = 5
So 66021-98-5 is a valid CAS Registry Number.

66021-98-5Relevant academic research and scientific papers

Regio- And stereoselective electrochemical synthesis of sulfonylated enethers from alkynes and sulfonyl hydrazides

Du, Wu-Bo,Wang, Ning-Ning,Pan, Chao,Ni, Shao-Fei,Wen, Li-Rong,Li, Ming,Zhang, Lin-Bao

supporting information, p. 2420 - 2426 (2021/04/07)

An electrooxidative direct difunctionalization of internal alkynes with sulfonyl hydrazides has been developed for the construction of sulfonated enethers. In this transformation, metal catalysts or stoichiometric amount of oxidants are not required and molecular nitrogen and hydrogen are the sole byproducts, providing a simple and green approach for preparing various sulfonyl tetrasubstituted alkenes. Notably, the protocol could be efficiently scaled up and the follow-up procedures of the corresponding functionalized alkenes demonstrate the practicality of the electrochemical synthesis.

COLLAGEN 1 TRANSLATION INHIBITORS AND METHODS OF USE THEREOF

-

Paragraph 00266-00267; 00272-00273, (2021/08/06)

The present invention relates to novel Collagen 1 translation inhibitors, composition and methods of preparation thereof, and uses thereof for treating Fibrosis including lung, liver, kidney, cardiac and dermal fibrosis, IPF, wound healing, scarring and G

Rh-Catalyzed Asymmetric Hydrogenation of α,β- and β,β-Disubstituted Unsaturated Boronate Esters

Hou, Guohua,Shen, Xin,Yan, Qiaozhi,Zi, Guofu

supporting information, (2020/05/08)

A highly enantioselective hydrogenation of α,β-unsaturated boronate esters catalyzed by Rh-(S)-DTBM-Segphos complex has been developed. Both (Z)-α,β- and β,β-disubstituted substrates can be successfully hydrogenated to afford chiral boronates with excellent enantioselectivities, up to 98 % ee. Furthermore, the obtained chiral boronate esters, as important versatile synthetic intermediates are successfully transformed to the corresponding chiral alcohols, amines and other important derivatives with maintained enantioselectivities.

Regiospecific palladium-catalyzed cross-coupling reactions using the operational equivalent of 1,3-dilithiopropyne

Cabezas, Jorge A.,Ferllini, Natasha

, p. 2387 - 2394 (2020/09/09)

A regiospecific palladium-catalyzed cross-coupling reaction using the operational equivalent of the dianion 1,3-dilithiopropyne, with aromatic iodides is reported. This reaction gives high yields of 1-propyn-1-yl-benzenes and 2-(propyn-1-yl)thiophenes in

Palladium-catalyzed methylation of terminal alkynes

Wang, Wei-Feng,Wu, Xiao-Feng

, (2019/10/22)

In this communication, a palladium-catalyzed procedure for the methylation of terminal alkynes has been developed. With N,N,N-trimethylbenzenaminium trifluoromethanesulfonate as the methyl source, various desired products were obtained in moderate to good yields. Both aromatic and aliphatic alkynes are applicable.

A Pd-catalyzed domino Larock annulation/dearomative Heck reaction

Liang, Ren-Xiao,Xu, Deng-Yun,Yang, Fu-Ming,Jia, Yi-Xia

supporting information, p. 7711 - 7714 (2019/07/09)

A palladium-catalyzed domino Larock annulation/dearomative Heck reaction is developed, which delivers a range of tetracyclic indoline derivatives in moderate to excellent yields through a Larock annulation of N-bromobenzoyl o-iodoanilines with alkynes and a subsequent intramolecular dearomative Heck reaction. This protocol provides a straightforward route to structurally diverse indolines from readily available starting materials by forming two new rings and three chemical bonds in a single step.

Asymmetric Synthesis of Axially Chiral 2-Aminobiaryls by Rhodium-Catalyzed Benzannulation of 1-Arylalkynes with 2-(Cyanomethyl)phenylboronates

Xue, Fei,Hayashi, Tamio

supporting information, p. 10368 - 10372 (2018/07/31)

Asymmetric benzannulation of 1-arylalkynes, where the aryl group is an ortho-substituted aromatic group, with 2-(cyanomethyl)phenylboronate was catalyzed by a rhodium complex coordinated with a chiral diene ligand to give high yields of axially chiral 2-aminobiaryls with greater than 90 % ee.

Trimethylsilyl-Protected Alkynes as Selective Cross-Coupling Partners in Titanium-Catalyzed [2+2+1] Pyrrole Synthesis

Chiu, Hsin-Chun,Tonks, Ian A.

supporting information, p. 6090 - 6094 (2018/05/30)

Trimethylsilyl (TMS)-protected alkynes served as selective alkyne cross-coupling partners in titanium-catalyzed [2+2+1] pyrrole synthesis. Reactions of TMS-protected alkynes with internal alkynes and azobenzene under the catalysis of titanium imido comple

BCl3-Induced Annulative Oxo- and Thioboration for the Formation of C3-Borylated Benzofurans and Benzothiophenes

Warner, Andrew J.,Churn, Anna,McGough, John S.,Ingleson, Michael J.

supporting information, p. 354 - 358 (2016/12/30)

BCl3-induced borylative cyclization of aryl-alkynes possessing ortho-EMe (E=S, O) groups represents a simple, metal-free method for the formation of C3-borylated benzothiophenes and benzofurans. The dichloro(heteroaryl)borane primary products can be protected to form synthetically ubiquitous pinacol boronate esters or used in situ in Suzuki–Miyaura cross couplings to generate 2,3-disubstituted heteroarenes from simple alkyne precursors in one pot. In a number of cases alkyne trans-haloboration occurs alongside, or instead of, borylative cyclization and the factors controlling the reaction outcome are determined.

Iridium-Catalyzed Intramolecular Methoxy C?H Addition to Carbon–Carbon Triple Bonds: Direct Synthesis of 3-Substituted Benzofurans from o-Methoxyphenylalkynes

Torigoe, Takeru,Ohmura, Toshimichi,Suginome, Michinori

supporting information, p. 10415 - 10419 (2016/07/21)

Catalytic hydroalkylation of an alkyne with methyl ether was accomplished. Intramolecular addition of the C?H bond of a methoxy group in 1-methoxy-2-(arylethynyl)benzenes across a carbon–carbon triple bond took place efficiently either in toluene at 110 °C or in p-xylene at 135 °C in the presence of an iridium catalyst. The initial 5-exo cyclization products underwent double-bond migration during the reaction to give 3-(arylmethyl)benzofurans in high yields.

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