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US 7,612,240 B2Granted
Halophospholanes and their preparation
AssigneeEvonik Degussa GmbH
InventorsArmin Börner, Jens Holz, Juan Almena, Renat Kadyrov, Axel Monsees, Thomas Riermeier
Life of this patent
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Abstract
The present invention is directed to a process for preparing compounds of the general formula (I). Compounds of the general formula (I) are advantageous precursors for preparing phospholane catalysts, especially bisphospholane catalysts. The invention therefore likewise provides for the use of the substances in question for preparing these catalysts.
Claims7
Process for preparing compounds of the formula (I)
- in which
- * is a stereogenic center,
- X is Cl, Br, or I,
- R1 and R4 are each independently (C1-C8)-alkyl, (C1-C8)-alkoxy, HO—(C1-C8)-alkyl, (C2-C8)-alkoxyalkyl,(C6-C18)-aryl, (C7-C19)-aralkyl, (C3-C18)-heteroaryl, (C4-C19)-heteroaralkyl, (C1-C8)-alkyl-(C6-C18)-aryl, (C1-C8)-alkyl-(C3-C18)-heteroaryl, (C3-C8)-cycloalkyl, (C1-C8)-alkyl-(C3-C8)-cycloalkyl, or (C3-C8)-cycloalkyl-(C1-C8)-alkyl,
- R2, R3 are each independently R1, OH or H, or
- (a)
- R1 and R2 form a (C3-C5)-alkylene bridge together,
- (b) R2 and R3 form a (C3-C5)-alkylene bridge together,
- (c) R1 and R3 form a (C3-C5)-alkylene bridge together, or
- (d) R2 and R4 form a (C3-C5)-alkylene bridge together,
- wherein
- compounds of the formula (II)
- in which
- *, R1, R2, R3, R4 are each as defined above,
- R, R′, R″ may each independently be R1,
- are reacted with halogenated compounds selected from the group consisting of halocarbon compounds which lack double bonds in which the ratio of carbon atoms to halogen atoms is 1:≧2.5, CCl3CN, CCl3COOEt, CCl(3-x)HxC(═O)Cl, C2Cl4Br2, Cl2, Br2, I2.
13 more elements
Compounds of the formula (I)
- in which
- * is a stereogenic center,
- X is Cl, Br, or I,
- R1 and R4 are each independently (C1-C8)-alkyl, (C1-C8)-alkoxy, HO—(C1-C8)-alkyl, (C2-C8)-alkoxyalkyl, (C6-C18)-aryl, (C7-C19)-aralkyl, (C3-C18)-heteroaryl, (C4-C19)-heteroaralkyl, (C1-C8)-alkyl-(C6-C18)-aryl, (C1-C8)-alkyl-(C3-C18)-heteroaryl, (C3-C8)-cycloalkyl, (C1-C8)-alkyl-(C3-C8)-cycloalkyl, or (C3-C8)-cycloalkyl-(C1-C8)-alkyl,
- R2 and R3 are each independently R1, OH or H, or
- (a) R1 and R2 form a (C3-C5)-alkylene bridge together,
- (b) R2 and R3 form a (C3-C5)-alkylene bridge together,
- (c) R1 and R3 form a (C3-C5)-alkylene bridge together, or
- (d) R2 and R4 form a (C3-C5)-alkylene bridge together.
6 more elements
Dependencies are inferred from the claim text.