| 1. | Such a helerocycle is found in pyrylium salts .
吡喃盐就是这类的杂环。 |
| 2. | Pyran is not aromatic, but the phrylium ion is .
吡喃不是芳香的，但英嗡离子是。 |
| 3. | Treatments of pyrylium salts with various nucleophilic reagents allows the production of a host of functionalized derivatives .
如果各种亲核试剂与吡喃盐反应，就可制取许多种带官能基的衍生物。 |
| 4. | Pyran is not aromatic , but the phrylium ion is
吡喃不是芳香的，但??英嗡离子是。 |
| 5. | Synthesis and crystal structure of - d - o - acetyl - glycopyranosyl azide
吡喃葡萄糖叠氮化物的合成及晶体结构 |
| 6. | Synthesis of 4 - hydroxy - 6 - methyl - 2 - pyrone
吡喃酮的合成 |
| 7. | Perarubicin based combination chemotherapy in 32 cases with advanced head and neck carcinoma
吡喃阿霉素联合化疗治疗32例晚期头颈部癌 |
| 8. | Brittle - ductile transition of micro - nano composite ceramics using ultrasonic vibration grinding
光致变色液晶萘并吡喃的合成及光致变色性质 |
| 9. | Carbasugars , carbocyclic analogues of true sugars , are compounds in which the ring - oxygen of furanoid or pyranoid sugars is replaced by methylene group
摘要碳环糖是一类呋喃或吡喃糖环中的氧原子被亚甲基取代后形成的糖类似物。 |
| 10. | A novel ring - enlargement oxidation of polyphenyl substituted cyclopentadienes in air ( or molecular oxygen ) promoted by perchloric acid was described , in which an oxygen atom was inserted into the cyclopentadiene - ring , forming a six - membered pyrylium salts
摘要报导了空气（或氧气）存在的条件下，由高氯酸引发多苯基取代环戊二烯发生新颖的碳碳键断裂扩环反应，在此反应中，氧原子插人到环戊二烯环中形成相应的六元环吡喃盐类化合物。 |
