tert-butyl 4-{[4-(5-ethoxy-5-oxopentyl)piperidin-1-yl]sulfonyl}tetrahydro-2H-pyran-4-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
乙醚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
三氟乙酸                                                                                  为溶剂,
                                                                                                                                                    反应 64.0h,
                                                                                                                以the desired 4-{[4-(5-ethoxy-5-oxopentyl)piperidin-1-yl]sulfonyl}tetrahydro-2H-pyran-4-carboxylic acid (9.30 g, 23.0 mmol) obtained as a white solid的产率得到4-{[4-(5-ethoxy-5-oxopentyl)piperidin-1-yl]sulfonyl}tetrahydro-2H-pyran-4-carboxylic acid