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91493-79-7

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91493-79-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91493-79-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,9 and 3 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91493-79:
(7*9)+(6*1)+(5*4)+(4*9)+(3*3)+(2*7)+(1*9)=157
157 % 10 = 7
So 91493-79-7 is a valid CAS Registry Number.

91493-79-7Downstream Products

91493-79-7Relevant articles and documents

One-pot access to sulfonylated naphthalenediols/hydroquinones from naphthols/phenols with sodium sulfinates in an aqueous medium

Meng, Lingxin,Zhang, Ruike,Guan, Yuqiu,Chen, Tian,Ding, Zhiqiang,Wang, Gongshu,Reheman, Aikebaier,Chen, Zhangpei,Hu, Jianshe

supporting information, p. 610 - 614 (2021/01/25)

A one-pot method towards sulfonylated hydroquinones/naphthalenediols in an aqueous medium has been developed with up to 97% yield. The whole reaction requiring no transition-metal catalysts could proceed smoothly with hypervalent iodine compounds as the oxidant. Both naphthols and phenols were viable with inexpensive and readily available sodium sulfinates as the sulfonylation reagents under an ambient atmosphere. This procedure is scalable, and the products could be easily obtained without column chromatography isolation. This journal is

Metal-free sulfonylation of quinones with sulfonyl hydrazides in water: Facile access to mono-sulfonylated hydroquinones

Li, Bin,Li, Yaqin,Yu, Linqian,Wu, Xiaoyu,Wei, Wanguo

, p. 2760 - 2765 (2017/04/14)

This paper describes a simple and practical protocol for the direct synthesis of monosulfonylated hydroquinones through a transition-metal-free cross-coupling between quinones and sulfonyl hydrazides in water. The procedure tolerates a variety of quinones

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