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84247-81-4

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84247-81-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84247-81-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,2,4 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 84247-81:
(7*8)+(6*4)+(5*2)+(4*4)+(3*7)+(2*8)+(1*1)=144
144 % 10 = 4
So 84247-81-4 is a valid CAS Registry Number.

84247-81-4Downstream Products

84247-81-4Relevant articles and documents

Aza-peterson olefinations: Rapid synthesis of (E)-alkenes

Britten, Thomas K.,Basson, Ashley J.,Roberts, Dean D.,McLaughlin, Mark G.

, p. 3535 - 3544 (2021/06/03)

An aza-Peterson olefination methodology to access 1,3-dienes and stilbene derivatives from the corresponding allyl- or benzyltrimethylsilane is described. Silanes can be deprotonated using Schlosser's base and added to N -phenyl imines or ketones to directly give the desired products in high yields.

PALLADIUM-CATALYZED DIASTEREOSELECTIVE SYNTHESES OF (E)-1-TRIMETHYLSILYL-2-ALKENES, (E)-1-TRIMETHYLSILYL-1-ALKEN-3-YNES, (1E,5E)-1-TRIMETHYLSILYL-1,5-ALKADIEN-3-YNES, (1E,3Z)- AND (1E,3E)-1-TRIMETHYLSILYL-1,3-ALKADIENES

Andreini, Bianca Patrizia,Carpita, Adriano,Rossi, Renzo,Scamuzzi, Barbara

, p. 5621 - 5640 (2007/10/02)

On the basis of our observation that (E)-1-bromo-1-alkenes undergo preferentially stereospecific Pd-catalyzed cross-couplings with a variety of organometallics, in the presence of the corresponding (Z)-stereoisomers, efficient and convenient diastereoselective procedures have been developed to prepare nearly stereoisomerically pure (E)-1-trimethylsilyl-2-alkenes (4), (E)-1-trimethylsilyl-1-alken-3-ynes (5), (1E,5E)-1-trimethylsilyl-1,5-alkadien-3-ynes (6), and (1E,3E)-1-trimethylsilyl-1,3-alkadienes (8) from stereoisomeric mixtures of alkenyl bromides.Compounds 5 have been stereoselectively converted into (1E,3Z)-1-trimethylsilyl-1,3-dienes (7) by selective hydrometallations, followed by hydrolysis.Some synthetic applications of compounds 5-8 have been also examined.

STEREOSPECIFIC SYNTHESIS OF (1E,3Z)-AND (1E,3E)-1-TRIMETHYLSILYL-1,3-DIENES BY MEANS OF SEQUENTIAL CROSS-COUPLING REACTIONS

Fiandanese, V.,Marchese, G.,Mascolo, G.,Naso, F.,Ronzini, L.

, p. 3705 - 3708 (2007/10/02)

A new synthesis of stereodefined 1-trimethylsilyl-1,3-dienes is described.The method is based on two sequential coupling reactions between Grignard reagents and the readily available (Z)-or (E)-1-bromo-2-phenylthioethene, in the presence of transition met

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