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1308732-67-3

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1308732-67-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1308732-67-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,8,7,3 and 2 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1308732-67:
(9*1)+(8*3)+(7*0)+(6*8)+(5*7)+(4*3)+(3*2)+(2*6)+(1*7)=153
153 % 10 = 3
So 1308732-67-3 is a valid CAS Registry Number.

1308732-67-3Downstream Products

1308732-67-3Relevant articles and documents

BF3·OEt2catalyzed chemoselective CC bond cleavage of α,β-enones: An unexpected synthesis of 3-alkylated oxindoles and spiro-indolooxiranes

Muthusamy, Sengodagounder,Prabu, Ammasi

supporting information, p. 558 - 564 (2022/02/07)

A BF3·OEt2 catalyzed highly chemoselective formal CC double bond cleavage reaction of α,β-enones with diazoamides for the synthesis of 3-alkylated oxindoles is developed. Boron trifluoride etherate is found to be an effective catalyst for the chemoselective Cα-Cβ cleavage of enones to obtain 3-alkylated oxindoles. The product formation indicates a selective β-carbon elimination pathway of α,β-enones using the inexpensive BF3·OEt2 as a catalyst, transition metal-free conditions, an open-air environment, good functional tolerance and broad substrate scope. The synthetic utility of this protocol is highlighted by synthesizing spiro-indolooxiranes.

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