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76143-80-1

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76143-80-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 76143-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,1,4 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 76143-80:
(7*7)+(6*6)+(5*1)+(4*4)+(3*3)+(2*8)+(1*0)=131
131 % 10 = 1
So 76143-80-1 is a valid CAS Registry Number.

76143-80-1Downstream Products

76143-80-1Relevant articles and documents

A ONE-POT ISOQUINOLINE SYNTHESIS BY CYCLODEHYDROGENATION OF BENZYLAMINOACETALS WITH CHLOROSULFONIC ACID

Kido, Kazuko,Watanabe, Yasuo

, p. 1151 - 1154 (2007/10/02)

A direct preparation of the fully aromatized isoquinolines (3a-l) by the cyclodehydrogenation of benzylamnoacetals (2a-l) with chlorosulfonic acid is described.Comparing the behavior of chlorosulfonic acid with that of sulfuric acid toward 1,2-dihydroisoquinoline, it is able to be suggested that benzylaminoacetals were cyclized first to 1,2-dihydroisoquinolines, subsequently, dehydrogenated to the fully aromatized isoquinolines by the hydride abstraction with ClSO3H.Subtitution by a larger R3 group than isopropyl in the acetal ArCH(R3)NHCH2CH(OEt)2, interfered this second step, so the corresponding isoquinolines could not be obtained.

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