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155622-69-8

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155622-69-8 Usage

General Description

1-Bromobut-3-en-2-one is a chemical compound that falls under the category of organobromine compounds, specifically as a brominated ketone. It has a molecular formula of C4H5BrO and a molecular weight of approximately 148.99 g/mol. Its physical properties include a yellow to light brown liquid appearance, a strong odor, and a boiling point of about 59-62℃ at 12 mmHg. It is notable for its diverse range of applications in the field of organic chemistry, often used as an intermediate in various organic syntheses. Despite these valuable properties, care must be taken in its handling and storage due to its highly reactive nature and potential hazardous effects.

Check Digit Verification of cas no

The CAS Registry Mumber 155622-69-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,6,2 and 2 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 155622-69:
(8*1)+(7*5)+(6*5)+(5*6)+(4*2)+(3*2)+(2*6)+(1*9)=138
138 % 10 = 8
So 155622-69-8 is a valid CAS Registry Number.
InChI:InChI=1/C4H5BrO/c1-2-4(6)3-5/h2H,1,3H2

155622-69-8SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name 1-BROMOBUT-3-EN-2-ONE

1.2 Other means of identification

Product number -
Other names 1-bromo-3-butene-2-one

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:155622-69-8 SDS

155622-69-8Relevant articles and documents

Synthesis of 1-bromo-3-butyn-2-one and 1,3-dibromo-3-buten-2-one

Mekonnen, Alemayehu,Westerlund, Andreas,Havelkova, Martina,Descomps, Alexandre,Carlson, Rolf

, p. 2472 - 2480 (2009)

Synthetic procedures for the preparation of 1-bromo-3-butyn-2-one and 1,3-dibromo-3-buten-2-one are given. These compounds are prepared from 2-bromomethyl-2-vinyl-1,3-dioxolane, which can readily be prepared from 2-ethyl- 2-methyl-1,3-dioxolane. The synthetic routes are as follows: 2-bromomethyl-2-vinyl-1,3-dioxolane is converted to2-(1,2-dibromoethyl)-2- bromomethyl-1,3-dioxolane. Double dehydrobromination with tBuOK affords 2-ethynyl-2-bromomethyl-1,3-dioxolane. Formolysis with formic acid gives 1-bromo-3-butyn-2-one. Deacetalized 2-bromoethyl-2-vinyl-1,3-dioxolane was treated with Br2 and Li2CO3/12-crown-4 in tetrahydrofuran to give 1,3-dibrom-3-buten-2-one in moderate yield.

Diversity-Orientated Stereoselective Synthesis through Pd-Catalyzed Switchable Decarboxylative C?N/C?S Bond Formation in Allylic Surrogates

Deng, Lei,Kleij, Arjan W.,Yang, Weibo

supporting information, p. 19156 - 19161 (2018/11/30)

Switchable catalytic transformation of reactants can be a powerful approach towards diversity-orientated synthesis from easily available molecular synthons. Herein, an endogenous ligand-controlled, Pd-catalyzed allylic substitution allowing for either selective C?N or C?S bond formation using vinylethylene carbonates (VECs) and N-sulfonylhydrazones as coupling partners has been developed. This versatile methodology provides a facile, divergent route for the highly chemo- and stereoselective synthesis of functional allylic sulfones or sulfonohydrazides. The newly developed protocol features wide substrate scope (nearly 80 examples), broad functional group tolerance, and potential for the late-stage functionalization of bioactive compounds. The isolation and crystallographic analysis of a catalytically competent π-allyl Pd complex suggests that the pathway leading to the allylic products proceeds through a different manifold as previously proposed for the functionalization of VECs with nucleophiles.

Deprotection of acetals from unsaturated, unstable bromoketones

Descomps, Alexandre,Carlson, Rolf

, p. 757 - 761 (2014/03/21)

The unstable ketones 1-bromo-3-buten-2-one, 1-bromo-3-butyn-2-one, and 1,3-dibromo-3-buten-2-one can be obtained from the corresponding acetals in high yields by treating the acetals with anhydrous iron (III) chloride suspended on dry silica. A simplified procedure for preparing the reagent is also given.

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