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181640-72-2

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181640-72-2 Usage

Chemical Properties

white to beige crystalline powder

Check Digit Verification of cas no

The CAS Registry Mumber 181640-72-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,6,4 and 0 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 181640-72:
(8*1)+(7*8)+(6*1)+(5*6)+(4*4)+(3*0)+(2*7)+(1*2)=132
132 % 10 = 2
So 181640-72-2 is a valid CAS Registry Number.

181640-72-2SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017

1.Identification

1.1 GHS Product identifier

Product name 5,11,17,23-TETRABROMO-25,26,27,28-TETRAPROPOXYCALIX[4!ARENE, 98

1.2 Other means of identification

Product number -
Other names DesMethylwedelolactone

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:181640-72-2 SDS

181640-72-2Relevant articles and documents

Selective halogen-lithium exchange reaction of bromine-substituted 25,26,27,28-tetrapropoxycalix[4]arene

Larsen, Mogens,Jorgensen, Mikkel

, p. 6651 - 6655 (1996)

Methods are described for the selective bromine-lithium exchange reaction of bromine-substituted calix[4]arenes with either n-BuLi or t-BuLi in THF. Quenching of the lithiated calix[4]arenes with MeOH, D2O, CH3SSCH3, B(OCHg3)3, DMF, or CO2 as electrophiles resulted in 5-monosubstituted, 5,17-disubstituted, or 5,11,17,23-tetrasubstituted calix[4]arenes with H, D, SCH3, B(OH)2, CHO, or COOH functionalities.

Calix[4]arene-based receptors with hydrogen-bonding groups immersed into a large cavity

Pinkhassik, Evgueni,Sidorov, Vladimir,Stibor, Ivan

, p. 9644 - 9651 (1998)

A one-pot procedure, which combines the Ritter and Friedel-Crafts reactions, produced the first members of a new type of calix[4]arene-based receptors. The cavity in these receptors is formed by a calix[4]arene framework fixed in the cone conformation and

Calix[4]arene amide compound and preparation method and application thereof

-

Paragraph 0026; 0027; 0038; 0049; 0060; 0071, (2018/04/21)

The invention belongs to the technical field of chemical aromatic amide compounds, in particular to a calix[4]arene amide compound and a preparation method and application thereof. The preparation method of the calix[4]arene amide compound comprises the following steps of: (1) preparing 5,11,17,23-tetrabromo-25,26,27,28-tetra-n-propyl calix[4]arene (II) in 1,3-alternate conformation; (2) preparing5,11,17,23-tetrathienyl-25,26,27,28-tetra-n-propyl calix[4]arene (III) in 1,3-alternate conformation; (3) preparing 5,11,17,23-tetra(5- formylthiophen)-25,26,27,28-tetra-n-propyl calix[4]arene (IV) in 1,3-alternate conformation; (4) preparing 5,11,17,23-tetra(5-carboxythienyl)-25,26,27,28-tetra-n-propyl calix[4]arene (V) in 1,3-alternate conformation; and (5) dissolving the 5,11,17,23-tetra(5-carboxythienyl)-25,26,27,28-tetra-n-propyl calix[4]arene (V) in 1,3-alternate conformation in 1,2-dichloroethane, cooling the mixture in an ice-water bath, adding thionyl chloride slowly and dropwise, then raising the temperature for reflux for 5 hours, then cooling the obtained mixture in an ice-water bath, adding a mixed solution of ammonia water and methylene chloride for a reaction at room temperature for 8-12 hours to obtain the product 5,11,17,23-tetra(5-acylaminothienyl)-25,26,27,28-tetra-n-propyl calix[4]arene (I) in 1,3-alternate conformation.

Design and synthesis of a new kind of cavitand: Tetrapyrazolylcalix[4] arenes and their supramolecular assemblies

Jiang, Xuan-Feng,Cui, Yu-Xin,Yu, Shu-Yan

, p. 1181 - 1185 (2014/05/20)

Two novel calix[4]arene-based tetrapyrazolyl cavitands with different cavity size were synthesized by multistep reactions. In the solid state, one of the cavitands forms an infinite chain by Aintermolecular hydrogen bonding. The other cavitand undergoes c

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