求翻译~~~~Syntheticroutesforthepreparationoffour-armstarPCL–DB24C8andtwo-armPCL–DBASareshowninScheme2.Firstly,toincorporatesitesformolecularrecognitionontopolymerprecursorsbyclickchemistry,alkynylcontainingDB24C8and

Question

求翻译~~~~
Synthetic routes for the preparation of four-arm star
PCL–DB24C8 and two-arm PCL–DBAS are shown in
Scheme 2. Firstly, to incorporate sites for molecular recognition
onto polymer precursors by click chemistry, alkynylcontaining
DB24C8 and dibenzylamine (DBA) moieties were
synthesized (see the Supporting Information, Scheme S1).
Alkynyl–DB24C8 was obtained in approximately 71% yield
from a macrocyclization reaction between propargyl 3,4-
dihydroxybenzoate and 1,2-phenylenebis(oxyethylenoxyethylenoxyethylene)
ditosylate, catalyzed by LiBr under
semi-high dilution conditions (see the Supporting Information,
Figure S1). Alkynyl–DBAwas synthesized by reacting 4-
formylphenyl propargyl ether with benzylamine followed by
reduction with NaBH4 (see the Supporting Information,
Figure S2). Pentaerythritol and ethylene glycol were used as
initiators for the ROP of e-caprolactone (CL) in the presence
of Sn(Oct)2 catalyst, yielding four-arm star PCL and a,wdihydroxy-
terminated PCL, respectively

Answer 1

制备四臂星形PCL-DB24C8和二臂PCL-DBAS的合成路线为方案2. 首先为分子识别而用点击化学将位置结合到聚合物前体上,从而合成含炔-DB24C8和二苄基胺（DBA）分子部分（参见支持资料,方案S1）.炔基－DB24C8是用LiBr催化,在半高稀释条件下,由炔丙基3,4-二羟基苯甲酸甲酯和1,2亚苯基双(oxyethylenoxye- thylenoxyethylene) 二甲苯磺酸盐之间的大环化反应得到的,产率约71％（参见支持资料,图S1）.炔基-DBA是通过4 甲醛苯基炔丙基醚与苯甲胺反应,然后与NaBH4反应而合成的（支持资料参见图S2）.季戊四醇和乙二醇被用作存在Sn(Oct)2催化剂时e-己内酯（CL）开环聚合的引发剂,分别产生四臂星形PCL和端α,ω-二羟基PCL.