1-Iodo-4-(trifluoromethoxy)benzene → 2,2-Dimethyl-5-(4-trifluoromethoxy-phenyl)-pent-4-yn-1-ol

온도

50 °C

To a degassed (argon) solution of 3.56 g (12.00 mmol) 1-iodo-4-trifluoromethoxy-benzene in 40 ml piperidine was added 0.58 g (0.50 mmol) Pd(PPh3)4 and 0.095 g. (0.50 mmol) CuI. The reaction mixture was stirred at 50° C. for 10 min, then 1.25 g (10.00 mmol) of above synthesized 2,2-dimethyl-pent-4-yn-1-ol in 20 ml of piperidine was added dropwise within 1 h. During the addition the oil bath was slowly heated to 80° C. starting after 30 min. The reaction mixture was stirred at this temperature for 2 h and then extracted with chilled aqueous 10% KHSO4/ether (three times). The organic phases were washed with aqueous 10% NaCl, dried (Na2SO4) and evaporated. Purification by flash-chromatography on silica gel (n-heptane/EtOAc 2:1 to 1:1) yielded 1.91 g of the title compound as a yellow oil.

1. additionwas added dropwise within 1 h
2. additionDuring the addition the oil bath
3. temperaturewas slowly heated to 80° C.
4. waitstarting after 30 min
5. stirringThe reaction mixture was stirred at this temperature for 2 h
6. extractionextracted with chilled aqueous 10% KHSO4/ether (three times)
7. washThe organic phases were washed with aqueous 10% NaCl
8. dry with materialdried (Na2SO4)
9. customevaporated
10. customPurification by flash-chromatography on silica gel (n-heptane/EtOAc 2:1 to 1:1)

ORD 기록

ord-57ca3b70da104aa989ddd73b95e6849a

출처 데이터셋

uspto-grants-2007_08

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07253192B2