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169131-88-8

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169131-88-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169131-88-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,1,3 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 169131-88:
(8*1)+(7*6)+(6*9)+(5*1)+(4*3)+(3*1)+(2*8)+(1*8)=148
148 % 10 = 8
So 169131-88-8 is a valid CAS Registry Number.

169131-88-8Relevant articles and documents

Template Effect of Pd(II) in the Synthesis of Differently Substituted Enantiopure γ-Butyrolactones and Its Synthetic Applications

Zhu, Guoxin,Lu, Xiyan

, p. 1657 - 1666 (1995)

Under the catalysis of Pd(II) in the presence of CuX2 and LiX, 1'-substituted allylic 2-alkynoates undergo stereoselective cyclization affording β, γ-disubstituted α-alkylidene-γ-butyrolactones with cis or trans relative configurations.A highly efficient hydrogenation reaction of the cyclization product afforded a trans-α, β-disubstituted-γ-butyrolactone in quantitative yield with high stereoselectivity.Isohomopilopic acid which can be converted into isopilocarpine was synthesized using this methodology by further transformation.

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