Synthesis of Furanose Spirooxindoles via 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU)-Catalyzed Aldol Reactions of a Pyruvic Aldehyde Derivative
نویسندگان
چکیده
منابع مشابه
Imidazolidinone intermediates in prolinamide-catalyzed aldol reactions.
The reaction between acetone and 4-nitrobenzaldehyde catalyzed by aniline prolinamide 1 was studied in depth. Working in different solvents with equimolar amounts of reagents and monitoring the reaction by 1H NMR, we detected and identified several imidazolidinones, such as those of the acetone 4, the aldol products 5a and 5b, and aldehydes 10a and 10b. According to our results, these compounds...
متن کاملSynthesis of Phosphorus Derivatives via Multicomponent Reactions
Stable derivatives of oxaphosphaphenanthrenes were prepared using multicomponent reactions of 3-bromo-2-naphthol, dialkyl acetylenedicarboxylate and trimethyl or triphenyl phosphite under microwave conditions with good yields.
متن کاملEnantioselective syn-selective scandium-catalyzed ene reactions.
An enantio- and diastereoselective carbonyl-ene reaction catalyzed by chiral scandium pyridyl bis(oxazoline) (pybox) complexes has been developed. Uniformly high enantiomeric excesses and good yields were observed. Use of trisubstituted olefins generated the syn product in high enantio- and diastereoselectivity.
متن کاملA facile synthesis of highly functionalized 4-arylcoumarins via Kostanecki reactions mediated by DBU.
An efficient synthesis of 4-arylcoumarins has been accomplished via Kostanecki reactions of 2-hydroxybenzophenones with acetic anhydride employing DBU at ambient temperature. Using the same strategy, several 2-acyloxybenzophenone derivatives were readily converted to 3,4-difunctionalized coumarins. This protocol offers a notable improvement in reaction conditions for coumarin synthesis and take...
متن کاملHighly enantioselective synthesis of syn-aldols of cyclohexanones via chiral primary amine catalyzed asymmetric transfer aldol reactions in ionic liquid.
Chiral primary-tertiary diamine/TfOH was found to catalyze kinetic resolution of racemic syn-aldols of cyclohexanones in ionic liquid effectively, affording the chiral syn-aldols with up to 99:1 syn/anti and 99% ee.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Asian Journal of Organic Chemistry
سال: 2014
ISSN: 2193-5807
DOI: 10.1002/ajoc.201400016