反应详情

100 mg (0.18 mmol) of 4,6-diiodo-1,2,3,3-tetramethyl-3H-indolium iodide and 51 mg (0.18 mmol) of N-[5-(phenylamino)-2,4-pentadienylidene]aniline monohydrochloride were stirred in 2 mL of acetic anhydride at 110-120° C. for 15 min. After cooling the product was precipitated with ether, filtered off and washed with ether. Yield: 67 mg (53%). λmax (abs) 483 nm (methanol). This product was used for following step without additional purification.

1. temperatureAfter cooling the product
2. customwas precipitated with ether
3. filtrationfiltered off
4. washwashed with ether
5. customwithout additional purification