Read e-book online Additions to C-X &pgr;-Bonds, Part 2, Volume 2 PDF

By C.H. Heathcock

ISBN-10: 0080405932

ISBN-13: 9780080405933

Quantity 2 offers typically with the addition reactions of delocalized carbanions (enolates) and their artificial kinfolk (metalloenamines, enol ethers, allyl organometallics) with carbonyl compounds, imines and iminium ions. significant emphasis is put on C-C bond-forming reactions similar to the aldol and Mannich reactions. Acylation reactions also are integrated during this quantity. numerous themes that experience no longer formerly been reviewed are coated, together with using enzymatic aldol reactions in synthesis and the Passerini-Ugi reactions.

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Extra info for Additions to C-X &pgr;-Bonds, Part 2, Volume 2

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One ethyl group would be equatorial. © 2012 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part. Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. 41 In each case, the formula at the left is named; the right-hand structure shows the other isomer. a. cis-1,3-dichlorocyclohexane b. 42 cis-1,3-Dimethylcyclohexane can exist in a conformation in which both methyl substituents are equatorial: CH3 CH3 H H In the trans isomer, one methyl group must be axial.

19 The boron adds to the less substituted carbon of the double bond, and, in the oxidation, the boron is replaced by an OH group. Note that the acid-catalyzed hydration of the same alkene would give the alcohol (CH3)2C(OH)CH2CH2CH2CH3 instead, according to Markovnikov’s rule. © 2012 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part. Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.

B. c. d. 25 Br 1,2-addition CH2 + CH2 CH CH CH2 Br Br 1,4-addition To find the structures of the diene and dienophile, break the cyclohexene ring just beyond the ring carbons that are connected to the double bond (the allylic carbons): © 2012 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part. Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part.

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Additions to C-X &pgr;-Bonds, Part 2, Volume 2 by C.H. Heathcock


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