Alkynes were successfully converted into α,β-acetylenic carbonyl compounds through radical-catalyzed aerobic oxidation using N-hydroxyphthalimide (NHPI) combined with a transion metal under mild conditions.
Hydrogenation Promoter, Hydrogenation Catalyst, and Process for Producing Alkene Compound
申请人:Hori Junichi
公开号:US20080033221A1
公开(公告)日:2008-02-07
A hydrogenation promoter of the present invention is produced by reacting an alkyne compound or an alkene compound, a palladium compound represented by a general formula Pd(II)X
j
L
k
(where L represents a monodentate ligand or a polydendate ligand other than a phosphorus-containing ligand (when two or more Ls are present in the compound, the Ls may be the same or different), X represents an anionic group, j represents a value determined according to the valence of X so that X
j
has a valence of −2 as a whole, and k represents an integer in the range of 0 to 4), and a base in an organic solvent. Specifically, The hydrogenation promoter of the invention includes palladium nanoparticles containing the alkyne compound or the alkene compound as an agglomeration-preventing agent.
Crosslinkable organopolysiloxane compositions, comprising;
(1) an organopolysiloxane which contains SiC-bonded radicals with aliphatic carbon-carbon multiple bonds, and
(2) an organopolysiloxane with Si-bonded hydrogen atoms or, instead of (1) and (2), or
(3) an organopolysiloxane which contains SiC-bonded radicals with aliphatic carbon-carbon multiple bonds and Si-bonded hydrogen atoms,
(4) a catalyst which promotes the addition of Si-bonded hydrogen onto an aliphatic multiple bond,
(5) a reinforcing filler
(6) a non-reinforcing filler having an average particle diameter of less than 30 &mgr;m and a BET surface area of less than 30 m
2
/g and, optionally, further substances.
Synth�se d'alcools ac�tyl�niques par alkylation d'hydroxy-?-alkynes-1
作者:Jacques Flahaut、Philippe Miginiac
DOI:10.1002/hlca.19780610635
日期:1978.9.20
Synthesis of acetylenic alcohols by alkylation of ω‐hydroxy‐1‐alkynesIn liquid ammonia and with lithium amide, the alkylation of an ω‐hydroxyl‐alkyne proceeds with good yield with primary or secondary alcohols and with fair yield with tertiary alcohols. It is a very convenient way to prepare many substituted acetylenic alcohols.
Perepelkin,O.V. et al., Journal of Organic Chemistry USSR (English Translation), 1966, vol. 2, p. 1719 - 1722