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Condensed trimethylamine (∼ 2 mL) was added dropwise to a solution of compound 7 (120 mg) in THF (5 mL) at ¨C78 ¡ãC. The mixture was allowed to warm up to room temperature. The precipitate was re-dissolved by the addition of water (10 mL). After the mixture was cooled down to ¨C78 ¡ãC, extra trimethylamine (∼ 2 mL) was added and the mixture was stirred for 24 h at room temperature. ×î½ü×öÁËÒ»¸öʵÑ飬²½ÖèÈçÉÏËùÊö£¬¾ÍÊÇÓÃÈý¼×°·½«äå´úÍ鼾炙¯£¬ÇëÎÊCondensed trimethylamineÊÇʲôÒâ˼£¬ÊÇŨÈý¼×°·»¹ÊÇÒºÌåÈý¼×°·£¬ÔÚÍøÉÏÂòµÄÒ©Æ·¶¼ÊÇÈý¼×°·µÄË®ÈÜÒº£¬ÄÜÖ±½ÓÓÃÂÍûÓоÑéµÄ´óÅ£²»Áߴͽ̣¬Ð¡µÜл¹ý£¡ |
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