Cas 754231-33-9,2-diazo-malonic acid ethyl ester 9-methoxy-2,2-bis-(4-methoxy-phenyl)-2<i>H</i>-benzo[<i>h</i>]chromen-5-ylmethyl ester

754231-33-9

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Basic information

Product Name: 2-diazo-malonic acid ethyl ester 9-methoxy-2,2-bis-(4-methoxy-phenyl)-2H-benzo[h]chromen-5-ylmethyl ester
Synonyms: 2-diazo-malonic acid ethyl ester 9-methoxy-2,2-bis-(4-methoxy-phenyl)-2H-benzo[h]chromen-5-ylmethyl ester
CAS NO:754231-33-9
Molecular Formula:
Molecular Weight: 594.621
EINECS: N/A
Product Categories: N/A

Chemical Properties

Melting Point: N/A
Boiling Point: N/A
Flash Point: N/A
Appearance: N/A
Density: N/A
Refractive Index: N/A
Storage Temp.: N/A
Solubility: N/A
CAS DataBase Reference: 2-diazo-malonic acid ethyl ester 9-methoxy-2,2-bis-(4-methoxy-phenyl)-2H-benzo[h]chromen-5-ylmethyl ester(CAS DataBase Reference)
NIST Chemistry Reference: 2-diazo-malonic acid ethyl ester 9-methoxy-2,2-bis-(4-methoxy-phenyl)-2H-benzo[h]chromen-5-ylmethyl ester(754231-33-9)
EPA Substance Registry System: 2-diazo-malonic acid ethyl ester 9-methoxy-2,2-bis-(4-methoxy-phenyl)-2H-benzo[h]chromen-5-ylmethyl ester(754231-33-9)

Safety Data

Hazard Codes: N/A
Statements: N/A
Safety Statements: N/A
WGK Germany:
RTECS:
HazardClass: N/A
PackingGroup: N/A
Hazardous Substances Data: 754231-33-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 754231-33-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,5,4,2,3 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 754231-33:
(8*7)+(7*5)+(6*4)+(5*2)+(4*3)+(3*1)+(2*3)+(1*3)=149
149 % 10 = 9
So 754231-33-9 is a valid CAS Registry Number.

754231-33-9Upstream product

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754231-33-9Relevant academic research and scientific papers

Carbenoid induced irreversible ring opening of naphthopyrans

Gabbutt, Christopher D.,Heron, B. Mark,Thomas, David A.,Light, Mark E.,Hursthouse, Michael B.

, p. 6151 - 6154 (2004)

Contrary to expectation rhodium carbenoids do not undergo cycloaddition to the 2H-pyran unit of the isomeric naphthopyrans 3 and 5. With 3, a naphtho[2,1-b]pyran-8-ylacetate, 4 is formed and a novel merocyanine dye 6 results from a cycloaddition across the C-5-C-6 double bond of the naphtho[1,2-b]pyran 5. Tethering the carbenoid to the naphtho[1,2-b]pyran system 5, as in 10, results in a similar mode of addition and affords the intensely coloured tetracycle 11.

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