func(tionalization): An efficient and practical protocol for the CH ortho arylation of benzoicacids with diaryliodonium salts by using water as an environmentally benign, nontoxic reaction medium is developed. The choice of water as the solvent is crucial for this reaction, which sets the stage for the broad application of aqueous conditions in CH functionalization reactions.
Biphenylcarboxylic acid with two competing C(sp(2))-H sites was designed for site selective C(sp(2))-H functionalization by developing carboxylic acids assisted remote and selective olefination via 7-membered palladacycle. Mechanism investigation and DFT calculations reveal a kinetics-determined process, which could be utilized to explore a variety of remote site selectivity. The practicability of this method was highlighted by the precise construction of phenathrene under sequential site selectivity.
Gibberellic acid. Part II. The structure and synthesis of gibberene
作者:T. P. C. Mulholland、G. Ward
DOI:10.1039/jr9540004676
日期:——
Yabuta et al., Nippon Nogeikagaku Kaishi, 1941, vol. 17, p. 975,980
作者:Yabuta et al.
DOI:——
日期:——
Synthesis of seven-membered lactones by regioselective and stereoselective iodolactonization of electron-deficient olefins
electron-deficient olefinic acids has been reported, which provides a straightforward access to a series of multi-functionalized seven-membered lactones containing two consecutive chiral centers. The ester substituents on the olefins played a key role in achieving high regioselectivity. This result was proved through experiments and DFT calculations.