A Guidebook to Mechanism in Organic Chemistry
^ CARBANIONS AND THEIR REACTIONS SOME organic compounds are known which function as acids, in the classical sense, in that a pro ...
Stability of Carbanions STABILITY OF CARBANIONS As might be expectgd, the effect of electron-withdrawing (i.e. activat ing) gro ...
Carbanions and Their Reactions H t R—CH^-N O R—CH*-N 9° o fc R—CH=N O^0 J HO r o~s o e i R—CH^C—R -> CHJ-C—R ~ R—CH=C—RJ H F ...
Stereochemistry of Carbanions The stability of the ion is reflected in the acidity of cyclopentadiene itself, demonstrating the ...
Carbanions and Their Reactions cannot be answered with any degree of confidence. A pyramidal structure would seem more likely bu ...
Carbanions and Tautomerism CARBANIONS AND TAUTOMERISM The enolisation mentioned above, is, of course, an example of the larger p ...
Carbanions and Their Reactions mechanism would, in suitable cases, involve the participation of a carbanion, while the second wo ...
Carbanions and Tautomerism EtO V EtO^H P-Ph C 6 H 4 ^C^-N=F< H Ph p-Ph-C.H^ Ph -r-C^ & C=N—C^H (XX) (XXI) OEt ^OEt wherea ...
Carbanions and Their Reactions the stepwise mode. Although not relevant to carbanions, it should perhaps be emphasised that keto ...
Carbanions and Tautomerism (iii) Structure and position of equilibrium Most information is available on this subject for keto/en ...
Carbanions and Their Reactions H / \ O O II I c c / \ X \ Me CH Me (XXTV) H / \ EtO O I c / \ CH Me (XXII) Apart from the furthe ...
Displacement Reactions of Carbanions form is present to the almost total exclusion of the aci-form (XXVI). Nevertheless, on acid ...
Carbanions and Their Reactions H (EtO,C),HCs + H—C—Br °OE« H (EtOsC)jHC—H (EtOjQjHC- H \ > »- -C Br I H H (Et0 2 C) 2 HC—C—H ...
Displacement Reactions of Carbanions but it is doubtful in most cases, whether a sufficiently negative carbon is generated in R° ...
Carbanions and Their Reactions R CHrCH^H R—CH^i d CH, R • CHj * CH3 RCH=CH 2 CI Na® CI® Na® Whether the process is actually init ...
Displacement Reactions of Carbanions Thus attack on CC1 2 yields (XXXI) which undergoes a proton shift to form (XXXII). This und ...
Carbanions and Their Reactions (iii) Halogenation of ketones One of the earliest observations having a bearing on the subject of ...
Halogenation of Ketones more acidic, and therefore more readily abstracted by base, but it will also help to stabilise the resul ...
Carbanions and Their Reactions OiH O-pH O H A® f H-t-CHj3-C—Me ===== AH+CH,==C—Me —> CH,—C—Me slow _< J fast | Br Br Br^ B ...
Decarboxylation O GJA. " > 0=C=0 + R^9 > R—H the resultant carbanion R® subsequently acquiring a proton from solvent or ot ...
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