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24265-23-4

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24265-23-4 Usage

General Description

4-Bromo-3,6-dihydro-2H-pyran, also known as 3-bromo-5,6-dihydropyran-2-one, is a chemical compound with the molecular formula C5H7BrO. It is a colorless to light yellow liquid with a faint, sweet odor. 4-BROMO-3,6-DIHYDRO-2H-PYRAN is primarily used as an intermediate in the synthesis of pharmaceuticals and other organic compounds. Its pyran ring structure and bromine substituent make it a versatile building block for the production of various derivatives with potential applications in the pharmaceutical and agrochemical industries. Additionally, 4-Bromo-3,6-dihydro-2H-pyran has been investigated for its potential as a fragrance ingredient and as a reactant in the synthesis of bioactive molecules with diverse biological activities. Overall, this chemical compound exhibits promising potential for a wide range of industrial and scientific applications.

Check Digit Verification of cas no

The CAS Registry Mumber 24265-23-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,4,2,6 and 5 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 24265-23:
(7*2)+(6*4)+(5*2)+(4*6)+(3*5)+(2*2)+(1*3)=94
94 % 10 = 4
So 24265-23-4 is a valid CAS Registry Number.

24265-23-4SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name 4-Bromo-3,6-dihydro-2H-pyran

1.2 Other means of identification

Product number -
Other names -

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:24265-23-4 SDS

24265-23-4Relevant articles and documents

Development of an efficient process for 3,6-dihydro-2h-pyran-4-boronic acid pinacol ester

Xue, Feng,Zhu, Yong,Li, Chang-Gong

, p. 1654 - 1659 (2015)

An efficient process for the synthesis of 3,6-dihydro-2H-pyran-4-boronic acid pinacol ester has been developed in one-pot manner. Starting from the condensation of 4-tetrahydropyranone with hydrazine hydrate, the subsequent treatment of hydrazone with copper(II) bromide-triethylamine and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) conveniently gave 4-bromo-3,6-dihydro-2H-pyran, which was then conducted through palladium-catalyzed borylation to afford the desired product using a low loading of a Pd catalyst.

Preparation method of heteroatom-containing cyclohexene halide

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Paragraph 0039-0041, (2019/12/25)

The invention discloses a preparation method of a heteroatom-containing cyclohexene halide, belonging to the field of synthesis of fine chemical intermediates. According to the preparation method, cyclohexanone containing heteroatoms is used as a raw material, and gem-dihalide or alkenyl halide is mainly generated in a halogenating reagent; and after an additive is added into organic alkali, and hydrogen halide is removed to generate cyclohexene halide containing heteroatoms. The method is simple in process; the operation of purifying a mixture in traditional methods is avoided; and a productis fully utilized. Under close-to-elimination condition of gem-dibromide, an additive is added to overcome the problem of difficulties in gem-dichloride elimination is by adding, and the purpose of controlling regioselectivity is achieved through steric hindrance of different alkalis.

Method for synthesizing 3, 6-dihydro-2H-pyrazine (thiazine) furan-4-boric acid ester

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Paragraph 0014, (2016/10/31)

The invention discloses a method for synthesizing 3, 6-dihydro-2H-pyrazine (thiazine) furan-4-boric acid ester. According to the method, tetrahydropyrazole (thiazine) furan-4-ketone serves as the raw material, generates hydrazone with p-toluenesulfonhydrazide, then reacts with NBS/organic alkali to generate alkenyl bromide and next forms Grignard reagent with magnesium metal, after the Grignard reagent is formed, boron reagent is added for a reaction, and the 3, 6-dihydro-2H-pyrazine (thiazine) furan-4-boric acid ester is obtained. By means of the method, ultralow temperature, column chromatography and palladium catalyzed coupling in a literature method are avoided, raw materials are easy to obtain, cost is low, conditions are mild, and the method has potential industrial application and amplification prospect.

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