二氢化茚

No indene was found, clearly showing that indanes and indenes may originate from different precursors, and algae lived in saltwater are important contributors to the indanes.

没检测到茚类化合物，说明二氢化茚和茚可以源自不同的先质，生活于咸水环境的低等生物是二氢化茚类化合物的母质之一。

Retene, simonellite, pimarene and long side chain indanes were identified in algal pyrolysates for the first time.

首次在藻类热模拟产物中检测到惹烯、西蒙内利烯、海松烯及长侧链二氢化茚类化合物。

The 6- cyano-1, 1 (1, 3- dioxypropylidene)-7-(carbomethoxyl group- methyl - 5- oxo-Delt6 (8)- tetrahydrochysene indolizine and haloethane reacts with each other for ethylization with existence of alkali and organic solution with or without phase transversion catalyst, and produces mentioned product.

本发明在相转移催化剂或无相转移催化剂存在下，6-氰基-1，1-(1，3-亚丙二氧基)-7-(甲氧羰基-甲基-5-氧代-Δ6(8)-四氢中氮茚类化合物与卤代乙烷在碱和有机溶剂的存在下进行乙基化反应即得6-氰基-1，1-(1，3-亚丙二氧基)-7-1′-(烷氧羰基-丙基-5-氧代-Δ6(8)-四氢中氮茚类化合物。

For the first time, enantiomers of C2-symmetric 1,1 -spirobiindane-7,7'-diol were resolved with crude menthyl chloroformate by phase-transfer catalysis in the presence of tetrabutylammonium bromide. The reaction was carried out at 0℃-rt. The diastereomers of SPINOL bis-menthyl carbonate can be separated by simple crystallization using alcohol. The hydrolysis of the diastereomers was carried out via aqueous NaOH/EtOH solution.

首次通过相转移催化的方法对螺双二氢茚二酚进行了有效的拆分，用L--氯甲酸薄荷醇酯做拆分剂，以四丁基溴化铵为催化剂在0℃-室温下进行酯化反应生成非对映体衍生物，以乙醇作溶剂，通过重结晶的方法分离衍生物，在水-乙醇混合溶剂条件下，用强碱NaOH或KOH分别水解，制得相应的光学纯度大于99%ee的两个异构体SPINOL，其中总收率：--SPINOL，78.2%；--SPINOL，80.6%。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。