(±)-1, a recently discovered, valuable, floral-type odorant, has been synthesized by a straightforward procedure (Scheme 1). To determine the properties of the enantiomers of 1, their separation by preparative HPLC and the determination of their absolute configuration by X-ray crystallography were carried out (Figure). Furthermore, the analogues 2–6 were synthesized, either from differently methylated
The present invention relates to the field of malodor counteraction. More particularly, it concerns malodor masking ingredient having an indane moiety (as defined in formula (I)), as well as malodor masking compositions comprising such ingredients.
Preparation of Trifluoromethylated Dihydrocoumarins, Indanones, and Arylpropanoic Acids by Tandem Superacidic Activation of 2-(Trifluoromethyl)acrylic Acid with Arenes
作者:G. K. Surya Prakash、Farzaneh Paknia、Habiba Vaghoo、Golam Rasul、Thomas Mathew、George A. Olah
DOI:10.1021/jo9026275
日期:2010.4.2
Indanones and coumarins are important intermediates for the convenient synthesis of many pharmaceutical and biologically active compounds. Fluoroorganics play a vital role in the design of very effective therapeutics due to significant enhancement in their lipophilicity, bioavailability, and fast uptake by the presence of fluorine in these molecules. Herein, we report an efficient one-pot synthesis of trifluoromethylated arylpropanoic acids, indanones, and dihydrocoumarins using Friedel-Crafts alkylation or tandem Friedel-Crafts alkylation-cycloacylation of arenes/phenols with 2-(trifluoromethyl)acrylic acid under superacidic conditions using trifluoromethanesulfonic acid. The results have been rationalized by the structure energy calculations of the involved reaction intermediates using ab initio theoretical methods.
Verfahren zur Herstellung eines Olefinpolymers unter Verwendung von Metallocenen mit speziell substituierten Indenylliganden
申请人:TARGOR GmbH
公开号:EP0582194B1
公开(公告)日:1998-05-06
INTERMEDIATE COMPOUNDS FOR PRODUCING PERFUMING INGREDIENTS