Unique catalysis of gold nanoparticles in the chemoselective hydrogenolysis with H2: cooperative effect between small gold nanoparticles and a basic support
Gold nanoparticles on hydrotalcite act as a heterogeneous catalyst for the chemoselective hydrogenolysis of various allylic carbonates to the corresponding terminal alkenes using H2 as a clean reductant. The combination of gold nanoparticles and basic supports elicited significantly unique and selective catalysis in the hydrogenolysis.
[EN] PROCESS FOR PREPARING JET FUEL FROM MOLECULES DERIVED FROM BIOMASS<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN CARBURANT AVIATION À PARTIR DE MOLÉCULES DÉRIVÉES D'UNE BIOMASSE
申请人:TOTAL RAFFINAGE MARKETING
公开号:WO2013053740A1
公开(公告)日:2013-04-18
The invention relates to a process for preparing jet fuel or jet fuel precursors which comprises the treatment of a charge derived from biomass, the said charge comprising at least one compound chosen from terpenes of formula [CH2=C(CH3)CH=CH2]n, in which n is an integer of from 2 to 12, the carbon chain of which is linear, cyclic or branched, or cyclic or branched terpenes as defined previously, which have been chemically modified by oxidation and/or rearrangement of the carbon backbone, the said process comprising a cycloaddition step (i) followed by a cracking and hydrogenation step (ii).
of synthetically useful reactions of 2-trimethylsilylmethyl-1,3-butadiene (7) are discussed. Reactions of 7 with acid chlorides, aldehydes, ketones and acetals activated by a Lewis acid give isoprenylated compounds, while 7 undergoes the Diels-Alderreaction with dienophiles. High regiospecificity of the reaction qualifies 7 for a versatile building block of terpene synthesis.
An efficient method for the reductive transposition of allylic alcohols
作者:Andrew G Myers、Bin Zheng
DOI:10.1016/0040-4039(96)00965-3
日期:1996.7
Mitsunobu reaction of allylicalcohols with o-nitrobenzenesulfonylhydrazine (NBSH) as nucleophile proceeds at −30 °C with invertive displacement; warming the resultant N-allylic sulfonylhydrazine derivative to 23 °C then leads to allylic diazene formation followed by sigmatropic elimination of dinitrogen. This one-step method for reductive 1,3-transposition is shown to be efficient and highly regio- and
Highly regioselective diels-alder reactions of 2-trimethylsilylmethyl- 1,3-butadiene catalyzed by a lewis acid and applications to syntheses of terpenes
2-Trimethylsilylmethyl-1,3-butadiene undergoes highly regioselective Diels-Alderreactions with dienophiles such as acrolein and methyl vinyl ketone catalyzed by aluminum chloride in which the “para” isomers are obtained almost exclusively. The adducts are converted readily to a variety of naturally occurring mono and sesquiterpenes.