基本释义
n.
炔
相关例句
alkyne
2.The Synthesis of Terminal Hydroxy Alkyne Ⅱ.The Synthesis of 4-Alkyl-3-butyn-1-ol
3.Abstract: This article reviews recent progress in nucleophilic reactions of the α-carbon in vinylidene ruthenium complexes. The nucleophiles include alkene, alkyne, alcohol, acid, amine, water, etc.
4.SAA ligand Lh could induce asymmetric addition of terminal alkyne to aldehydes without using air-sensitive Ti(O~iPr)4and expensive Zn(OTf)2.with good result of high yield (up to 99%) and good enantioselectivities (up to 84%ee).
5.Based on characteristics and connectivity of the groups in molecules, the group contribution method and topological method was combined together, a new method was developed which can be used to calculate the density of alkyne from molecular structure.
6.Sulfony 13 oxybicyclo[9.3.0]tetradec 3,8 diyne is the precursor of the bicyclic enediyne which has been synthesized from cis 1,2,3,6 tetrahydropathalican hydride by 8 step reactions. We got the goal compound by reduction of anhydride, ozonolysis of 8 oxabicyclo[4.3.0]non 3 ene, Witting reaction with PPh 3/CBr 4, formation of alkyne and esterification, reduction of the ester, formation of the mesylate, cyclization with sodium sulfide nonhydrate.
7.Under the following reaction conditions:access temperature of reactor was 30~35 ℃,LHSV was 1.5~2.0 h~ -1,pressure was 2.8 MPa,V(H_2)/V(C_9) was 400,the results of C_9 hydrogenated showed that m(Br_2)/m(C_9) reduced from 1.387 to 0.122～0.158.Under the following reaction conditions:temperature was 20~25 ℃,LHSV was 5.0 h~ -1,pressure was 1.3~1.5 MPa,n(H_2)/n(C_5) was 0.59,the results of C_5(the mass fraction of p- diolefin and alkyne was 35.0%~45.0%,olefin was 30.0%~40.0%) hydrogenated showed that the hydrogen fractional conversion of diolefin reached to 100% and the hydrogen fractional conversion of olefin reached to more than 95%.