ES259498A1 - Procedure for the manufacture of spyrocyclic polycetons and anholic esters and anholic esters of the same (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the manufacture of spyrocyclic polycetons and anholic esters and anholic esters of the same (Machine-translation by Google Translate, not legally binding)
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F Hoffmann La Roche AG
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F Hoffmann La Roche AG
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Publication of ES259498A1publicationCriticalpatent/ES259498A1/en
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur
(AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Process for the manufacture of spirocyclic polyketones and enol ethers and enol esters thereof which comprises reacting a 2-carbalkoxy-coumaran-3-one of the general formula ** in which r1 r2 r3 and r4 each represents hydrogenalkyloalkoxyhydroxynitro or halogen while r6 represents lower alkyl with an alkenylmethyl ketone of the general formula wherein r5 represents hydrogen or alkyl below cyclizing the resulting addition product and it is desired to convert the resulting spirocyclic polyketone into its enolic ether or enolic ester. (Machine-translation by Google Translate, not legally binding)
ES0259498A1959-06-251960-06-23Procedure for the manufacture of spyrocyclic polycetons and anholic esters and anholic esters of the same (Machine-translation by Google Translate, not legally binding)
ExpiredES259498A1
(en)
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