Cas 220156-21-8,(4R,5R)-2-[(E)-2-(tert-Butyldiphenylsiloxymethyl)ethenyl]-4,5-bis[methoxydiphenylmethyl]-1,3,2-dioxaborolane

220156-21-8

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Basic information

Product Name: (4R,5R)-2-[(E)-2-(tert-Butyldiphenylsiloxymethyl)ethenyl]-4,5-bis[methoxydiphenylmethyl]-1,3,2-dioxaborolane
Synonyms:
CAS NO:220156-21-8
Molecular Formula:
Molecular Weight: 758.837
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: (4R,5R)-2-[(E)-2-(tert-Butyldiphenylsiloxymethyl)ethenyl]-4,5-bis[methoxydiphenylmethyl]-1,3,2-dioxaborolane(CAS DataBase Reference)
NIST Chemistry Reference: (4R,5R)-2-[(E)-2-(tert-Butyldiphenylsiloxymethyl)ethenyl]-4,5-bis[methoxydiphenylmethyl]-1,3,2-dioxaborolane(220156-21-8)
EPA Substance Registry System: (4R,5R)-2-[(E)-2-(tert-Butyldiphenylsiloxymethyl)ethenyl]-4,5-bis[methoxydiphenylmethyl]-1,3,2-dioxaborolane(220156-21-8)

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: 220156-21-8(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 220156-21-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,1,5 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 220156-21:
(8*2)+(7*2)+(6*0)+(5*1)+(4*5)+(3*6)+(2*2)+(1*1)=78
78 % 10 = 8
So 220156-21-8 is a valid CAS Registry Number.

220156-21-8Upstream product

220156-21-8Downstream Products

220156-21-8Relevant academic research and scientific papers

Enantiomerically pure cyclopropylboronic esters: Auxiliary-versus substrate-control

Pietruszka, Joerg,Witt, Andreas

, p. 4293 - 4300 (2000)

Stable, enantiomerically pure cyclopropylboronic esters are synthesized from alkynes by a hydroboration-cyclopropanation sequence. The direct hydroboration-utilizing 1,3,2-dioxaborolane 4-is most convenient, however, with more functionalized side-chains it failed to give the desired intermediates. Using the more reactive dicyclohexylborane, followed by oxidation and transesterification, is a good alternative one-pot conversion. Cyclopropanations were performed either following a Simmons-Smith protocol or with diazomethane-palladium(II) acetate. The influence on the diastereoselectivity of the auxiliary 1 is compared with the influence of an additional stereogenic center in the side-chain.

Enantiomerically pure cyclopropylboronic esters: Auxiliary- versus substrate-control

Pietruszka, Joerg,Witt, Andreas

, p. 4293 - 4300 (2007/10/03)

Stable, enantiomerically pure cyclopropylboronic esters are synthesized from alkynes by a hydroboration-cyclopropanation sequence. The direct hydroboration - utilizing 1,3,2-dioxaborolane 4 - is most convenient, however, with more functionalized side-chains it failed to give the desired intermediates. Using the more reactive dicyclohexylborane, followed by oxidation and transesterification, is a good alternative one-pot conversion. Cyclopropanations were performed either following a Simmons-Smith protocol or with diazomethane-palladium(II) acetate. The influence on the diastereoselectivity of the auxiliary 1 is compared with the influence of an additional stereogenic center in the side-chain. The Royal Society of Chemistry 2000.

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