novel nickel catalyst for the reaction of tert-butyl isocyanide insertion was discovered. In this approach, 1,2-bis(diphenylphosphino)ethane (L3) serves as an efficient ligand, thereby allowing the preparation of lactones from (o-bromophenyl)phenylethanone derivatives. It is noteworthy that this is the first example of nickel acting as a metal catalyst in the reactions of tert-butyl isocyanide insertion
Isoflavone derivatives were synthesized viaintramolecularcyclization of 3‐(2‐bromophenyl)‐3‐oxopropanal derivatives, using CuI as the catalyst, 2‐picolinic acid (=pyridine‐2‐carboxylic acid) as the ligand, K2CO3 as the base, and DMF as the solvent, in up to 96% yield. The synthesis is functional group‐tolerant.
异黄酮衍生物是通过以CuI为催化剂,以2-吡啶甲酸(=吡啶-2-羧酸)为配体,以K 2 CO 3为催化剂,通过3-(2-溴苯基)-3-氧丙醛衍生物的分子内环化反应合成的。碱和DMF作为溶剂,产率高达96%。合成是官能团耐受的。
Ketones
申请人:Barton John Peter
公开号:US20050272036A1
公开(公告)日:2005-12-08
Compounds of formula (I): wherein variable groups are as defined within; for use in the inhibition of 11βHSD1 are described.
3-Substituted 4-quinolones were synthesized using a one-pot metal-free strategy in moderate to quantitative yields. Carried out in dimethylsulfoxide (DMSO) via a sequential addition of materials, the methodology is tolerant of a wide range of functional groups and applicable to library synthesis.