Application of Allylzinc Reagents as Nucleophiles in Matteson Homologations
作者:Oliver Andler、Uli Kazmaier
DOI:10.1021/acs.orglett.1c03164
日期:2021.11.5
nucleophiles that can be used in Matteson homologations. The linear substitution products are formed almost exclusively, and excellent E selectivities are observed in reactions of reagents with sterically demanding or aryl substituents on the double bond. The allylated boronic esters obtained can be converted into trifluoroborates or subjected to further homologations. Ozonolysis of the double bond provides
Asymmetric Synthesis of Stegobinone via Boronic Ester Chemistry
作者:Donald S. Matteson、Hon-Wah Man、Oliver C. Ho
DOI:10.1021/ja960345a
日期:1996.1.1
stereoselective asymmetricboronicester chemistry has been used to install all three chiral centers in a convergent synthesis of highly pure stegobinone, the epimerically labile pheromone of the drugstore beetle, Stegobium paniceum, and the furniture beetle, Anobium punctatum. Asymmetric centers were installed via the reaction of (dichloromethyl)lithium with 1,2-dicyclohexylethane-1,2-diol boronicesters. The
Application of Vinyl Nucleophiles in Matteson Homologations
作者:Thorsten Kinsinger、Uli Kazmaier
DOI:10.1021/acs.orglett.2c01119
日期:2022.5.27
nucleophiles was found to be a versatile tool for the synthesis of highly substituted and functionalized allyl boronic esters. High yields and stereoselectivities are obtained with sterically demanding alkyl boronic esters and/or Grignard reagents. With the application of such vinyl Matteson homologations, the polyketide fragment of lagunamide B is synthesized.
发现与乙烯基亲核试剂的 Matteson 同系化是合成高度取代和功能化的烯丙基硼酸酯的通用工具。使用空间要求高的烷基硼酸酯和/或格氏试剂可获得高产率和立体选择性。通过应用这种乙烯基 Matteson 同系物,合成了 lagunamide B 的聚酮化合物片段。
Combining Matteson Homologations and Claisen Rearrangements – An Efficient Protocol for Amino Acid Synthesis
作者:Thorsten Kinsinger、Uli Kazmaier
DOI:10.1002/ejoc.202201345
日期:2023.1.24
The Matteson homologation with vinyl nucleophiles can be combined with the zinc-chelated ester enolate Claisenrearrangement to obtain highly functionalized unusual amino acids. The substitution pattern of the sidechain can be determined by variation of the nucleophiles used in the homologation steps.
Stereoselective Synthesis of Secondary and Tertiary Boronic Esters via Matteson Homologation
作者:Markus Tost、Uli Kazmaier
DOI:10.1021/acs.orglett.3c02360
日期:2023.9.22
esters with lithium dichlorocarbenoids and various nucleophiles proved to be a useful method for the synthesis of functionalized polyketides in a highlystereoselective fashion. Via repeated homologation steps, only 1,2-anti- and 1,3-syn-configured products were obtained. Homologation with substituted carbenoids followed by reaction with carbon nucleophiles resulted in configurationally inverted products