Sequential Ruthenium Catalysis for Olefin Isomerization and Oxidation: Application to the Synthesis of Unusual Amino Acids
作者:Marc Liniger、Yiyang Liu、Brian M. Stoltz
DOI:10.1021/jacs.7b08496
日期:2017.10.4
How can you use a ruthenium isomerization catalyst twice? A ruthenium-catalyzed sequence for the formal two-carbon scission of allyl groups to carboxylic acids has been developed. The reaction includes an initial isomerization step using commercially available ruthenium catalysts followed by in situ transformation of the complex to a metal-oxo species, which is capable of catalyzing subsequent oxidation
[EN] METHOD FOR THE PREPARATION OF 1-ARYL-1-ALKYL-2-ALKYL-3-DIALKYLAMINOPROPANE COMPOUNDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS 1-ARYL-1-ALKYL-2-ALKYL-3-DIALKYLAMINO-PROPANE
申请人:SIEGFRIED AG
公开号:WO2013185928A1
公开(公告)日:2013-12-19
The present invention refers to the preparation of 1-aryl-1-alkyl-2-alkyl-3-dialkylamino-propane compounds, such as tapentadol, using a diastereoselective Eschenmoser-Claisen or Ireland-Claisen rearrangement.
A general synthesis of 1,2- and 1,3-cyclic ureas is accomplished by intramolecular allylic C-H amination employing Pd(TFA)(2)/bis-sulfoxide as a catalyst. By careful modification of substrates and catalyst, a variety of 1,2-cyclic ureas are accessible from not previously employed terminal olefins substituted in allylic or vinylic positions. Furthermore, MS4A is found to be an effective additive for the synthesis of 1,3-cyclic ureas in good yields and excellent diastereoselectivities.
HART, D. J.;KANAI, KEN-ICHI;TOHOMAS, D. G.;YANG, TENG-KUEI, J. ORG. CHEM., 1983, 48, N 3, 289-294
作者:HART, D. J.、KANAI, KEN-ICHI、TOHOMAS, D. G.、YANG, TENG-KUEI
DOI:——
日期:——
METHODS OF PREPARING PRIMARY, SECONDARY AND TERTIARY CARBINAMINE COMPOUNDS IN THE PRESENCE OF AMMONIA
申请人:Thadani Avinash N.
公开号:US20100174090A1
公开(公告)日:2010-07-08
The present application relates to novel methods for the preparation of primary, secondary and tertiary carbinamine compounds, particularly the preparation of compounds of formulae I, IV and VI, from a carbonyl compound of formula II in the presence of ammonia or an ammonium equivalent of the formula NH
4
+
X
−
, by way of allylation, crotylation, arylation, reductive amination and catalytic hydrogenation.