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111832-23-6

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111832-23-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111832-23-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,8,3 and 2 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 111832-23:
(8*1)+(7*1)+(6*1)+(5*8)+(4*3)+(3*2)+(2*2)+(1*3)=86
86 % 10 = 6
So 111832-23-6 is a valid CAS Registry Number.

111832-23-6Downstream Products

111832-23-6Relevant articles and documents

A stereocontrolled approach to electrophilic epoxides

Meth-Cohn, Otto,Moore, Clive,Taljaard, Heinrich C.

, p. 2663 - 2674 (2007/10/02)

Lithium t-butyl hydroperoxide (easily generated by addition of an alkyl-lithium to anhydrous t-butyl hydroperoxide in THF solution) is a powerful reagent for the epoxidation of electrophilic alkenes at -20 to 0 °C under full stereocontrol. Thus αβ-unsaturated esters, sulphones, sulphoximines, and amides are readily epoxidised with complete regio- and stereo-specificity and with considerable chiroselectivity (20-100%) when appropriate chiral auxiliaries such as menthyl, 8-phenylmenthyl, or a camphor-sulphonamide derivative are used. Asymmetric αβ-unsaturated sulphoximines undergo epoxidation with 100% diastereoselectivity. The only exceptions to stereocontrol noted are heavily substituted maleate esters such as di-t-butyl maleate. The αβ-epoxy amides are shown to be valuable sources of the corresponding epoxy ketones by treatment with an organolithium, allowing a stereo- and chemoselective entry in high yield to these useful intermediates.

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