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136185-66-5

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136185-66-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136185-66-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,1,8 and 5 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 136185-66:
(8*1)+(7*3)+(6*6)+(5*1)+(4*8)+(3*5)+(2*6)+(1*6)=135
135 % 10 = 5
So 136185-66-5 is a valid CAS Registry Number.

136185-66-5Relevant articles and documents

Regioselective Opening of Epoxy Alcohols: Mild Chemo- and Stereoselective Preparation of Iodohydrins and 1,2-Diols

Bonini, Carlo,Righi, Giuliana,Sotgiu, Giovanni

, p. 6206 - 6209 (2007/10/02)

Several 2,3-epoxy alcohols have been opened, at -60 deg C, with MgI2, leading to the corresponding 3-iodo 1,2-diols with a high level of regio- and chemoselectivity.The iodohydrins can be reduced "in situ", by means of nBu3SnH, to the corresponding 1,2-diols.The chemo-, regio-, and stereocontrol of the reaction makes the method of wide use.Furthermore, epoxy alcohol derivatives (acetyl, benzyl, or TBMS) still maintain a strong preference for C-3 attack of the nucleophile.The experimental data strongly suggest that a metal (Mg) centered chelate is formed throughout the reaction, which gives rise to the regioselective delivery of the iodiode ion.

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