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55517-36-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55517-36-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,5,1 and 7 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 55517-36:
127 % 10 = 7
So 55517-36-7 is a valid CAS Registry Number.



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

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017


1.1 GHS Product identifier

Product name 1-benzoyl-1(trimethylsiloxy)ethylene

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:55517-36-7 SDS

55517-36-7Relevant articles and documents

Diels-Alder Approach to Bicyclic α-Hydroxy Ketones. Facile Ketol Rearrangements of Strained α-Hydroxy Ketones

Creary, Xavier,Inocencio, Pamela A.,Underiner, Ted L.,Kostromin, Ray

, p. 1932 - 1938 (2007/10/02)

The trimethylsiloxy-substituted dienophiles 1-benzoyl-1-(trimethylsiloxy)ethylene, 6, 1-carbomethoxy-1-(trimethylsiloxy)ethylene, 12, and 1-acetyl-1-(trimethylsiloxy)ethylene, 4, all reacted with cyclopentadiene to give adducts in which the carbonyl containing substituent of the major product occupied the exo position, in violation of the Alder rule.Desilylation of the Diels-Alder adducts of cyclopentadiene with 4 and 6 led to ring-expanded ketol rearrangement products on silica gel chromatography.This facile rearrangement was attributed to relief of strain in the star ting α-hydroxy ketone.Equilibration studies showed that in the rearranged 2-hydroxy-2-substituted bicyclooctan-3-one systems 24 and 30, the more stable isomer is the one in which the phenyl or methyl substituent is in the axial position.The presence of a strong intramolecular hydrogen bond of the equatorial hydroxyl group with the carbonyl group accounts for the greater stability of 24 and 30.Acetolysis of endo-2-benzoyl-exo-2-norbornyl mesylate, 2, occurred readily, giving mainly the rearranged product of internal return, 1-benzoyl-exo-norbornyl mesylate, 38.The high reactivity of 2 relative to the endo analogue and the α-H analogue was attributed to some transition-state carbonyl conjugation with the incipient α-keto cation center as well as possible neighboring ?-participation and/or steric rate enhancement.

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