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Cyclododecyne, also known as dodeca-1,8-diyne, is a cyclic alkyne with the molecular formula C12H16. It is a colorless liquid with a pungent odor and is insoluble in water. Cyclododecyne is synthesized through the Diels-Alder reaction of cyclopentadiene with dimethyl acetylenedicarboxylate, followed by hydrolysis and decarboxylation. This chemical is primarily used as an intermediate in the synthesis of various organic compounds, such as pharmaceuticals and agrochemicals, due to its unique cyclic structure and reactivity. It is also known for its potential use in the production of advanced materials, like polymers and specialty chemicals. However, due to its reactivity and potential hazards, cyclododecyne requires careful handling and storage.

1129-90-4

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1129-90-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1129-90-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,2 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1129-90:
(6*1)+(5*1)+(4*2)+(3*9)+(2*9)+(1*0)=64
64 % 10 = 4
So 1129-90-4 is a valid CAS Registry Number.
InChI:InChI=1/C12H20/c1-2-4-6-8-10-12-11-9-7-5-3-1/h1-10H2

1129-90-4SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name cyclododecyne

1.2 Other means of identification

Product number -
Other names 1-Cyclododecyne

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:1129-90-4 SDS

1129-90-4Relevant academic research and scientific papers

An expedient and stereoselective synthesis of alkenyl nonaflates from silyl enol ethers: Optimization, scope and limitations

Lyapkalo, Ilya M.,Webel, Matthias,Reissig, Hans-Ulrich

, p. 1015 - 1025 (2007/10/03)

The fluoride-catalysed reaction between silyl enol ethers 1 and nonafluorobutanesulfonyl fluoride (NfF) has been optimized, resulting in an expedient synthesis of the corresponding alkenyl nonaflates 3. Tetra-n-butylammonium fluoride, dried either with molecular sieves or with potassium fluoride, and potassium fluoride in the presence of dibenzo-18-crown-6 were the best and most practical catalysts for this process. The reaction allows the synthesis of a wide variety of cyclic and acyclic alkenyl nonaflates 3 in good to excellent yields. For E/Z isomeric alkenes the configuration of the double bond is essentially retained. Remarkably, enolates derived from methyl ketones also provide C-sulfonylation products 4 as a side product; the desired alkenyl nonaflates 31 and 3m could, however, be prepared in good yields by further optimization. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.

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