Abstract:
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of alpha,beta-unsaturated ketones. The catalysts are chiral imidazolidinone compounds having the structure of formula IIA: or IIB: or are acid addition salts thereof, wherein, in one preferred embodiment, R1 is C1-C6 alkyl, R2 is phenyl or 2-methylfuryl, R3 and R4 are hydrogen, and R5 is phenyl optionally substituted with 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C1-C6 alkyl. The chiral imidazolinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.
Abstract:
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of alpha , beta -unsaturated aldehydes. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA) or (IIB) or are acid addition salts thereof, wherein, in one preferred embodiment, R is C1-C6 alkyl, R is tri(C1-C6 alkyl)substituted methyl, R and R are hydrogen, and R is phenyl optionally substituted with one 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C1-C6 alkyl. The chiral imidazolidinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.
Abstract:
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of α, β-unsaturated aldehydes. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA) or (IIB) or are acid addition salts thereof, wherein, in one preferred embodiment, R 1 is C 1 -C 6 alkyl, R 2 is tri(C 1 -C 6 alkyl)substituted methyl, R 3 and R 4 are hydrogen, and R 5 is phenyl optionally substituted with one 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C 1 -C 6 alkyl. The chiral imidazolidinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.
Abstract:
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of α,β-unsaturated ketones. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA): or (IIB): or are acid addition salts thereof, wherein, in one preferred embodiment, R 1 is C 1 -C 6 alkyl, R 2 is phenyl or 2-methylfuryl, R 3 and R 4 are hydrogen, and R 5 is phenyl optionally substituted with 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C 1 -C 6 alkyl. The chiral imidazolinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.