Isn't it also a consequence of better orbital overlap between the p-orbitals on oxygen (2p) and the 2p orbitals of the benzene ring? The halogens (excepting flourine) all have much larger p-orbitals (3p, 4p, 5p) available for donation and the overlap is much worse. Logged Print Pag...
on the benzene ring one or two substituents selected from the group consisting of halogen and cyano, or R1 and R2 are joined to form-CH> = C (Ph) - (wherein Ph is phenyl); R3 is hydrogen or C1-6 alkoxy; and Z is a group represented by the formula acontinuaci贸n: ** ** ...
(structure shown), and the configuration of all other products was assigned by analogy.aSubstrate scope ofN-cinnamylbenzamides bearing various substituents on Ar1and Ar2ring.bSubstrate scope ofN-cinnamylbenzamides with “complex substituents” on Ar2ring and Ar2 = heterocyclic groups.cGram-...
E represents a 5-6 membered heterocyclic group containing one or more hetero atoms selected from nitrogen atom, oxygen atom and sulfur atom, and said heterocyclic group optionally has one or more substituents selected from C1 -C4 alkyl group and C1 -C4 alkoxy group), R2 represents C6 -C12 ar...
The term "benzyl" as used herein refers specifically to a phenyl substituted methyl in which the phenyl group may be substituted with 1, 2, or 3 substituents independently selected from halo, nitro, cyano, alkyl of from one to six carbon atoms, alkoxy, and halo-substituted alkyl and the li...
a 5- to 10-membered non-aromatic heterocyclic group and may have a bond at any substitutable position of a ring having at least one of a nitrogen atom, an oxygen atom, and a sulfur atom in the ring, or a ring fused with a cycloalkane, a benzene ring and/or a ring having at ...