Substrate-Directed Diastereoselective Hydroformylation of Methallylic Alcohols. -An effective directing metal-coordinating group is required for the diastereoselective hydroformylation. A key auxiliary is the Dpb group. Thus, the educts lead by catalytic hydroformylation to syn-aldehydes in very hi
Substrate-Directed Diastereoselective Hydroformylation of Methallylic Alcohols
โ Scribed by Dr. Bernhard Breit
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 383 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0044-8249
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โฆ Synopsis
dropwise to a suspension of [AuCl(tht)] (100 mg. 0.312 mmol) in acetone (10 mL). The reaction mixture was stirred for 5 h and the solvents were evaporated to dryness. Addition of hexane (10 mL) and filtration through Kieselguhr led to a colorless solution Concentration of the solution to ahout 1 mL and addition of a mixture of ether (I mL) and methanol (10 mL) gave a white solid which was separated by filtration. washed uith methanol, and dried under vacuum. Compound C1 was purified by column chromatography (hexane/dichloromethane 4/1) to give a white microcrystalline product.
๐ SIMILAR VOLUMES
Substrate-Directed Diastereoselective Hydroformylation. Part 1. Substrate-Directed Diastereoselective Hydroformylation of Methallylic Alcohols -Development of an Efficient Catalyst-Directing Group for Rhodium-Catalyzed Hydroformylation. -The protection of methallylic alcohols (I) with the o-( diphen
Substrate Directed Diastereoselective Hydroformylation of Acyclic Homomethallylic Alcohols. -Diastereoselective hydroformylation of acyclic alcohols is achieved with the aid of a catalyst-directing group. In all cases the corresponding aldehydes are formed in good yields with high anti-selectivity.
Stereoselective hydroformylation of methallylic alcohols of types 3 and 4, that employed the substratebound catalyst-directing ortho-diphenylphosphanylbenzoyl (o-DPPB) group, was used as a key step for the construction of bifunctionalized stereotriads, which are central building blocks of polyketide