Selective mixed coupling of carboxylic acids (II). — photolysis of unsymmetrical diacylperoxides with alkenyl-, halo-, keto-, carboxyl-groups and a chiral α-carbon. Comparison with the mixed kolbe electrolysis
作者:Michael Feldhues、Hans J. Schäfer
DOI:10.1016/s0040-4020(01)97195-9
日期:1985.1
cholanoyl or 3- and 4-carboxyalkanoyl peroxides can be coupled (40 – 70 %). The α-chiral diacyl peroxide ls undergoes the photochemical coupling reaction with 80 % retention of its configuration. The photolysis of diacyl peroxides at −78° C proves to be a favorable supplement of the Kolbe-electrolysis in cases, where the electrolysis fails or produces low yields.
Nitrogen heterocycle biaryls for osteoporosis and other diseases
申请人:Letourneau John Jeffrey
公开号:US20050222203A1
公开(公告)日:2005-10-06
Nitrogen heterocycle biaryls having a carboxylate terminus are useful for treating endometriosis, osteoporosis, restenosis following angioplasty, rheumatoid arthritis, cancer, macular degeneration and obesity.
Compounds of formula:
are disclosed. A representative example is
[EN] HIGH-COVERAGE, LOW ODOR MALODOR COUNTERACTANT COMPOUNDS AND METHODS OF USE<br/>[FR] COMPOSÉS AGISSANT CONTRE LES MAUVAISES ODEURS, À FAIBLE ODEUR ET À POUVOIR COUVRANT ÉLEVÉ, ET PROCÉDÉS D'UTILISATION
申请人:INT FLAVORS & FRAGRANCES INC
公开号:WO2016049523A1
公开(公告)日:2016-03-31
The present invention relates to novel compounds and their use as malodor counteractant materials.
本发明涉及新化合物及其作为恶臭对抗剂材料的用途。
Method for producing anellated tetrahydro-{1h}-triazoles
申请人:——
公开号:US20040097728A1
公开(公告)日:2004-05-20
The present invention relates to a process for preparing fused tetrahydro-[
1
H]-triazoles of the formula I
1
where the variables R
a
, Z, Z
1
, X, W, n and Q are as defined in claim 1, by cyclization of compounds of the formula II
2
where R is C(X)OR
2
or C(X)SR
2
, where X is oxygen or sulfur, and R
2
is as defined in claim 1, in the presence of a base.
The invention also relates to compounds of the formula I where W is sulfur if Z is a methylene group optionally substituted by R
a
, and furthermore to compounds of the formula I where Q is a benzoxazole or benzothiazole radical, and to the use of these compounds as herbicides.
Selective Isomerization–Hydroformylation Sequence: A Strategy to Valuable α-Methyl-Branched Aldehydes from Terminal Olefins
作者:Paweł Dydio、Marten Ploeger、Joost N. H. Reek
DOI:10.1021/cs400872a
日期:2013.12.6
For the first time, an original selective isomerization-hydroformylation sequence to convert terminal olefins bearing an anionic moiety to α-methyl-branched aldehydes with unprecedented selectivities is reported. This opens up new synthetic avenues to these valuable building blocks from inexpensive and bioavailable substrates. The catalytic system involves a suitable selective monoisomerization catalyst