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Showing 1 to 3 of 3 for “"Darzens reaction"”.
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The Anti Selective Aldol Addition of Ketones to Aldehydes Mediated by N-Amino Cyclic Carbamate Chiral Auxiliaries and Its Use in the Asymmetric Total Synthesis of (+)- and (-)-Mefloquine Hydrochloride
… control. Simple manipulation of the reaction conditions allows for the <italic>O</italic>-benzylation of the prepared aldol products and the subsequent removal of the ACC auxiliary to give the β-benzyloxy ketone. Both symmetric and asymmetric ketones can be utilized, and aldol …
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Neue optisch aktive Phosphoniumsalze als Phasentransferkatalysatoren sowie die Verwendung der korrespondierenden Phosphane in der asymmetrischen Katalyse
… is described. Emphasis is placed on the Darzens-reaction of benzaldehyde and chloroacetophenone. First, achiral phosphoniumsalts were used under variation of the structure of the salt, temperature, reaction time and base. This was followed by the synthesis of polymerbound …
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Asymmetric Catalysis with Brønsted Acids: Experiments and Calculations
… used to design enantioselective ring-closing reactions to furnish nitrogen-based heterocycles via iminium ions as reactive intermediates. Two of the transformations presented in this work include imino-Diels-Alder and Pictet-Spengler reactions. Moreover, a S,O-thioacetalization reaction to …