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190912-17-5

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190912-17-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 190912-17-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,9,1 and 2 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 190912-17:
(8*1)+(7*9)+(6*0)+(5*9)+(4*1)+(3*2)+(2*1)+(1*7)=135
135 % 10 = 5
So 190912-17-5 is a valid CAS Registry Number.

190912-17-5SDS

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 (R)-2-methyl-2H-pyran-4(3H)-one

1.2 Other means of identification

Product number -
Other names (2R)-2-methyl-2,3-dihydro-4H-pyran-4-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:190912-17-5 SDS

190912-17-5Relevant articles and documents

Total Synthesis of Mycinamicin IV as Integral Part of a Collective Approach to Macrolide Antibiotics

Sp?th, Georg,Fürstner, Alois

, (2022/01/13)

The total synthesis of the 16-membered macrolide mycinamicin IV is outlined, which complements our previously disclosed, largely catalysis-based route to the aglycone. This work must also be seen in the context of our recent conquest of aldgamycin N, a related antibiotic featuring a similar core but a distinctly different functionalization pattern. Taken together, these projects prove that the underlying blueprint is integrative and hence qualifies for a collective approach to this prominent class of natural products. In both cases, the final glycosylation phase mandated close attention and was accomplished only after robust de novo syntheses of the (di)deoxy sugars of the desosamine, chalcose, mycinose and aldgarose types had been established. Systematic screening of the glycosidation promoter was also critically important for success.

A Scalable Synthesis of (R,R)-2,6-Dimethyldihydro-2H-pyran-4(3H)-one

Young, Ian S.,Haley, Matthew W.,Tam, Annie,Tymonko, Steven A.,Xu, Zhongmin,Hanson, Ronald L.,Goswami, Animesh

, p. 1360 - 1368 (2015/11/02)

A scalable synthesis of (R,R)-2,6-dimethyldihydro-2H-pyran-4(3H)-one is reported. Key to this strategy is the Ti(OiPr)4-catalyzed Kulinkovich cyclopropanation of silyl protected (R)-ethyl 3-hydroxybutanoate, and subsequent oxidative fragmentati

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