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137588-68-2

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137588-68-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137588-68-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,8 and 8 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 137588-68:
(8*1)+(7*3)+(6*7)+(5*5)+(4*8)+(3*8)+(2*6)+(1*8)=172
172 % 10 = 2
So 137588-68-2 is a valid CAS Registry Number.

137588-68-2Downstream Products

137588-68-2Relevant academic research and scientific papers

STUDIES ON PHOSPHONIUM YLIDES XVII. THE BEHAVIOUR OF WITTIG REAGENTS TOWARD 1,4-NAPHTHOQUINONEMONOBENZENESULFONIMINE

Boulos, L. S.,Zayed, M. F.,El-Khoshnieh, Y. O.

, p. 231 - 236 (2007/10/02)

Methylenetriphenylphosphoranes (IIa, b) react with 1,4-naphthoquinonemonobenzenesulfonimine (I) yielding the new azapropane adduct IIIa together with the dimeric adducts IIIb, IIIc, and IIId.Structures of the new products were established by analytical and spectroscopic (IR, 1H NMR, 31P NMR, 13C NMR, and MS) results.A mechanism is proposed to explain the formation of compound III.Key words: 1,4-Naphthoquinonemonobenzenesulfonimine (I); Carbmethoxymethylenetriphenylphosphorane (IIa); Carbethoxymethylenetriphenylphosphorane (IIb); the new azapropane adduct IIIa; the dimeric products IIIb, IIIc and IIId.

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