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89396-38-3

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89396-38-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89396-38-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,3,9 and 6 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 89396-38:
(7*8)+(6*9)+(5*3)+(4*9)+(3*6)+(2*3)+(1*8)=193
193 % 10 = 3
So 89396-38-3 is a valid CAS Registry Number.

89396-38-3Downstream Products

89396-38-3Relevant articles and documents

Novel 1,2,3-Thiadiazolyl Sulfines from the Reaction of N-Substituted Hydrazones with Thionyl Chloride

Britton, Thomas C.,Lobl, Thomas J.,Chidester, Constance G.

, p. 4773 - 4780 (2007/10/02)

The reaction of 17β-acetoxy-5α-androstan-3-one (ethoxycarbonyl)hydrazone (5a) with neat SOCl2 at 65 deg C gave (1Z)-17β-acetoxy-5α-androst-2-eno-thiadiazole-1-thione S-oxide (6) in 84percent yield.Under similar conditions the corresponding tosyl- and formylhydrazones afforded 17β-acetoxy-5α-androst-2-enothiadiazole (7) in 84percent and 85percent yields, respectively, while the acetylhydrazone gave a mixture of the two products.A single-crystal X-ray of 6 revealed a close (2.66 Angstroem) sulfine-O thiadiazole-S distance suggestive of a weakly attractive interaction.The ethoxycarbonyl hydrazones of a series of cyclohexanone derivatives were similarly reacted with SOCl2.Those substrates having γ-alkyl substituents afforded 1,2,3-thiadiazolyl sulfines in moderate to good yield.The 3,3,5,5-tetramethyl- and 2,5-methanocyclohexanone derivatives gave only the corresponding 1,2,3-thiadiazoles.When 5a was treated with 2 equiv of SOCl2 at -20 deg C, in addition to 6 and 7, the intermediates 17β-acetoxy-2'-(ethoxycarbonyl)-2',5'α-dihydro-5α-androstanothiadiazole 1'-oxide (22) and 17β-acetoxy-2'-(ethoxycarbonyl)-2'H-5α-androst-1-enothiadiazole (23) were isolated.Based on the above and additional mechanistic studies, a mechanism for the formation of 6 and 7 from 5a is proposed.The general behavior of hydrazones with SOCl2 is rationalized in light of this mechanism.

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