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Reaction-controlled phase-transfer catalysis preparation

Cyclopropanecarboxylic esters have been prepared, in 75—86 % yield, by intramolecular alkylation of 4-chloroalkyl esters, using phase-transfer catalysis. Monoalkylation of nitro-alkenes by acrylic esters occurs in a controlled manner if a two-phase system is used, to give products of Michael addition in 45—65 % yield for five examples. An interesting variant on this reaction involves the generation of the a-nitro-carbanion by conjugate reduction of a nitroalkene with sodium borohydride followed by its conjugate addition to methyl acrylate yields of 62—95% are reported for five cases (Scheme 39). ... [Pg.114]

See other pages where Reaction-controlled phase-transfer catalysis preparation is mentioned: [Pg.125]    [Pg.86]    [Pg.318]    [Pg.16]    [Pg.258]    [Pg.5]    [Pg.141]    [Pg.29]    [Pg.141]    [Pg.315]    [Pg.61]    [Pg.304]    [Pg.480]    [Pg.43]   
See also in sourсe #XX -- [ Pg.431 ]



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Catalysis preparation

Phase control

Phase-transfer catalysis preparation

Phase-transfer reactions

Phase-transfer reactions catalysis

Preparation phase

Reaction-controlled phase-transfer

Reaction-controlled phase-transfer catalysis

Transfer Control

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