3-(3-hydroxy-6-iodo-2-pyridyl)-propionic acid methyl ester   、                                                                                      
4-戊炔-1-醇                                                                                                                                                              在
                                                                                                                                                                                 crude product   、                                                                                                  silica gel   、                                                                                                  
正己烷                                                                                                                                  作用下,
                                                                                                                                                                                                                            以1.2 g of 3-[3-hydroxy-6-(5-hydroxy-1-pentynyl)-2-pyridyl]-propionic acid methyl ester is obtained as colorless oil的产率得到3-[3-hydroxy-6-(5-hydroxy-1-pentynyl)-pyridin-2-yl]-propionic acid methyl ester