摘要:
                                Total synthesis of the marine natural product euryfuran (4) via two sequential furan ring transfer reaction is presented.  Key elements of the reaction pathway include as follows; 1) the preparation of propargyl ethers (5c), (10b), and (17c), and its transformation to allylic alcohols (6), (11) and (18), 2) introduction of the angular alkyl group via [3,3] sigmatropic rearrangement.