Efficient Synthesis of 3-Iodoindenes via Lewis-Acid Catalyzed Friedel−Crafts Cyclization of Iodinated Allylic Alcohols
摘要:
A convenient BF3 center dot Et2O-catalyzed Friedel-Crafts cyclization of iodinated allylic alcohols is reported. The present reaction provides an efficient protocol to 3-iodo-1H-indene derivatives in good to high yields under mild conditions. Further, the iodoindene derivatives are valuable synthetic building blocks for elaboration of molecular complexity, such as in the construction of multiaryl substituted indenes by Suzuki coupling reaction.
Cu<sup>I</sup>/L-Proline-Catalyzed Coupling of Substituted 3-Iodoprop-2-en-1-ols with 1-Alkynes and Subsequent Cyclization: A Convenient Approach for Synthesizing Polysubstituted Furans
作者:You Wang、Lanting Xu、Dawei Ma
DOI:10.1002/asia.200900523
日期:2010.1.4
Coming full circle: CuI/L‐proline‐catalyzed coupling of substituted 3‐iodoprop‐2‐en‐1‐ols and terminal alkynes followed by copper‐mediated cycloisomerization produced furans in good yields. This method allows the assembly of 2,3,4‐ and 2,3,5‐trisubstituted furans, as well as 2,3,4,5‐tetrasubstituted furans.