IODOARENE DERIVATIVE, METHOD FOR PRODUCING OPTICALLY ACTIVE SPIROLACTONE COMPOUND USING SAME, AND METHOD FOR PRODUCING OPTICALLY ACTIVE CYCLIZATION ADDUCT
Modular Synthesis of Triazole-Based Chiral Iodoarenes for Enantioselective Spirocyclizations
作者:Christian Hempel、Caeciliea Maichle-Mössmer、Miquel A. Pericàs、Boris J. Nachtsheim
DOI:10.1002/adsc.201700246
日期:2017.9.4
A new triazole‐based C1‐symmetrical chiral iodoarene was synthesized in a highly modular route. Based on enzymatic kinetic resolution of an easily accessible propargylic alcohol both enantiomers were accessible in enantiopure form. By Huisgen‐type azide‐alkyne cycloaddtion a series of differently substituted iodoarenes was synthesized in high overall yields. Finally this novel iodoarene was successfully
Chiral hypervalent iodine-catalyzed enantioselective oxidative Kita spirolactonization of 1-naphthol derivatives and one-pot diastereo-selective oxidation to epoxyspirolactones
作者:Muhammet Uyanik、Takeshi Yasui、Kazuaki Ishihara
DOI:10.1016/j.tet.2010.04.060
日期:2010.7
hydrogen-bonding interactions as a chiral catalyst for the enantioselectiveKitaoxidativespirolactonization of 1-naphthol derivatives 5. Iodosylarenes 8 were generated in situ from iodoarenes 7 and mCPBA as a co-oxidant. Furthermore, epoxyspirolactone 15 was obtained by the one-pot oxidation of 5 with mCBPA in the presence of 7g. Thus, the enantioselectiveoxidation of 5 to 6 and the successive enantio-