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91055-81-1

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91055-81-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91055-81-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,0,5 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91055-81:
(7*9)+(6*1)+(5*0)+(4*5)+(3*5)+(2*8)+(1*1)=121
121 % 10 = 1
So 91055-81-1 is a valid CAS Registry Number.

91055-81-1Relevant articles and documents

Stereoselective Barbier-Type Allylations and Propargylations Mediated by CpTiCl3

López-Martínez, Josefa L.,Torres-García, Irene,Rodríguez-García, Ignacio,Mu?oz-Dorado, Manuel,álvarez-Corral, Miriam

, p. 806 - 816 (2019/01/24)

CpTiCl2, prepared in situ by manganese reduction of CpTiCl3, is an excellent new system for the Barbier-type allylation and propargylation of carbonyl compounds. It can be used in catalytic amounts when combined with Et3N·HBr/TMSBr, which acts as a regenerating system. The high regio- and stereoselectivity shown by this system makes it useful for prenylation and crotylation processes in the synthesis of natural products.

Oxime-mediated facile access to 5-methylisoxazoles and applications in the synthesis of valdecoxib and oxacillin

Dong, Kui-Yong,Qin, Hai-Tao,Bao, Xing-Xing,Liu, Feng,Zhu, Chen

supporting information, p. 5266 - 5268 (2015/01/09)

A palladium-catalyzed efficient synthesis of 5-methylisoxazoles via oxime-mediated functionalization of unactivated olefins is described. The reaction affords a variety of 5-methylisoxazoles in moderate to good yields. To further demonstrate the utility of the method, the rapid synthesis of valdecoxib and oxacillin is reported. (Chemical Equation Presented).

Pd-catalyzed nucleophilic allylic alkylation of aliphatic aldehydes by the use of allyl alcohols

Kimura, Masanari,Shimizu, Masamichi,Tanaka, Shuji,Tamaru, Yoshinao

, p. 3709 - 3718 (2007/10/03)

Under catalysis of Pd(OAc)2-(P-n-Bu)3, Et 2Zn promotes a variety of allyl alcohols to undergo nucleophilic allylation of aliphatic aldehydes and ketones at room temperature and provides homoallyl alcohols in 60-90 and ca. 60% isolated yield, respectively. The reaction is irreversible and kinetically controlled, and unique regio- and stereoselectivities observed for the allylation with unsymmetrically substituted allyl alcohols are discussed.

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