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21900-45-8

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21900-45-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21900-45-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,0 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21900-45:
(7*2)+(6*1)+(5*9)+(4*0)+(3*0)+(2*4)+(1*5)=78
78 % 10 = 8
So 21900-45-8 is a valid CAS Registry Number.

21900-45-8SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name 4-bromo-2-methylbenzoyl chloride

1.2 Other means of identification

Product number -
Other names 2-methyl-4-bromobenzoyl chloride

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:21900-45-8 SDS

21900-45-8Relevant articles and documents

Aerobic C(sp2)-H Hydroxylations of 2-Aryloxazolines: Fast Access to Excited-State Intramolecular Proton Transfer (ESIPT)-Based Luminophores

G?bel, Dominik,Clamor, Nils,Lork, Enno,Nachtsheim, Boris J.

, p. 5373 - 5377 (2019)

The direct hydroxylation of 2-aryloxazolines via a deprotonative magnesiation using TMPMgCl·LiCl and subsequent oxidation with molecular oxygen or air as a green oxidant is reported. This method proceeds under mild conditions at room temperature with high regioselectivity and chemoselectivity. The obtained phenols exhibit tunable luminescence properties, induced by excited-state intramolecular proton transfer. This method opens a new opportunity for the sustainable synthesis of luminescent organic molecules.

Synthesis of Extended 1,3,4-Oxadiazole and 1,3,4-Thiadiazole Derivatives in the Suzuki Cross-coupling Reactions

Wróblowska, Monika,Kudelko, Agnieszka,Ku?nik, Nikodem,?aba, Katarzyna,?apkowski, Mieczys?aw

, p. 1550 - 1557 (2017)

New derivatives of 1,3,4-oxadiazole and 1,3,4-thiadiazole were synthesized by a palladium catalyzed Suzuki cross-coupling reaction under the conditions of the phase transfer catalysis. The structure of the products, the absorption and emission spectra wer

Palladium-Catalyzed 5-exo-dig Cyclization Cascade, Sequential Amination/Etherification for Stereoselective Construction of 3-Methyleneindolinones

Zuo, Youpeng,He, Xinwei,Tang, Qiang,Hu, Wangcheng,Zhou, Tongtong,Hu, Wenbo,Shang, Yongjia

supporting information, p. 2117 - 2123 (2020/12/22)

An cascade intramolecular 5-exo-dig cyclization of N-(2-iodophenyl)propiolamides and sequential amination/etherification (with N-hydroxybenzamides, phenyl hydroxycarbamate) protocol for the synthesis of amino- and phenoxy-substituted 3-methyleneindolinones using unexpensive Pd(PPh3)4 as catalyst has been developed. The protocol enables the assembly of structurally important oxindole cores featuring moderate functional group tolerance (particularly the halo group), affording a broad spectrum of products with diverse substituents in good to excellent yields. (Figure presented.).

INTERMEDIATES AND METHODS FOR THE PREPARATION OF TOLVAPTAN AND ITS DERIVATIVES

-

Page/Page column 28, (2021/12/31)

The present invention relates to new intermediates for the synthesis of tolvaptan and its derivatives, as well as a method for its preparation involving said intermediates.

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