英语翻译Makaluvamine C is a pyrroloiminoquinone which has been isolated from marine sponges.This molecule has been synthesized in 13 steps from p-anisidine.The key steps in this synthesis include an intramolecular nucleophilic aromatic substituti
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英语翻译
Makaluvamine C is a pyrroloiminoquinone which has been isolated from marine sponges.This molecule has been synthesized in 13 steps from p-anisidine.The key steps in this synthesis include an intramolecular nucleophilic aromatic substitution mediated by potassium tert-butoxide,the selective reduction of a dinitro ester using catalytic hydrogenation,and the novel use of Fremy's salt to synthesize an iminoquinone from an amino phenol.The synthesis of makaluvamine C has been achieved from p-anisidine in 13.1% overall yield.
Makaluvamine C 是一种从海绵动物中提取的一种亚氨基吡咯醌.这种物质是从对茴香胺(p-anisidine.)开始经过13步合成而来,合成的关键不周包括:叔丁醇钾盐介导的芳香亲和取代、利用催化氢化进行的二硝基酯的选择性还原,还有利用Fremy盐从氨基苯酚合成亚氨基醌.该合成路径的收率为13.1%.
英语翻译Makaluvamine C is a pyrroloiminoquinone which has been isolated from marine sponges.This molecule has been synthesized in 13 steps from p-anisidine.The key steps in this synthesis include an intramolecular nucleophilic aromatic substituti
英语翻译f f r t a c i
英语翻译Em cười đẹp cực 小丽 àh
英语翻译--You didn't invite Anna?--______her,too?A Should I have invited B Must I have invited C Must I invite D Should I invite
英语翻译How I wish I _____ catch up with others.A.could B.can C.will D.shall
英语翻译my stomach feels ( ),I think I ate something bad at lunch time.A.terrible B.friendly C.tired
英语翻译C'est moi qui ai fait sonner I'alarme ce matin!
英语翻译---Can you tell a story_____English?---Yes,I can.A.in B.on C.and
英语翻译Ngu ng c T i yêu b n 这句越南语又是
英语翻译fux off!i dunt wanna c sth,the dayz always dark
英语翻译Saycheesebut keep____while I take your photographA.quiet B.calm C.still D.silent
英语翻译When I ------- -------,I found I ------ ----- ------ ------ ---- -------
英语翻译I dream,I believe,I insist
英语翻译May I
英语翻译I know ( )( )( ).
英语翻译I-you are-
英语翻译I ---------- ---------- ---------- English ---------- math.
英语翻译用I开头