Protecting group

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    a silylating agent, and the acyl function is installed on the amino group using the corresponding acid chloride or acid anhydride. (3) Some acyl functions such as benzoyl, α-phenylcinnamoyl, and naphthaloyl are directly incorporated on the nucleobase using the corresponding anhydride (Watanabe and Fox, 1966; Bhat et al., 1989). Zhu et al. (2003) reported an improved synthesis of N-benzoylated nucleosides by reducing the amounts of chlorotrimethylsilane (TMSCl) and benzoyl chloride to nearly equivalent quantities. The major advantage of this method is the easier work-up and higher yields. The original method by Ti et al. (1982) was further simplified by eliminating the addition of ammonium hydroxide. (4) The exocyclic amino group of cytidine and deoxycytidine were directly acylated using activated esters (Igolen and Morin, 1980), acid chlorides (Mishra and Misra, 1986, and references therein), or alkyloxycarbonylbenzotriazoles (Himmelsbach et al., 1984). (5) Site-selective incorporation and removal of N-acyl protecting groups have also been achieved by enzymatic methods (Prasad and Wengel, 1996). (6) Selective acylation of nucleosides has also been carried out by N-acyltetrazole (Bhat et al., 1998) and carboxylic acids activated in situ with carbonyldiimidazole (Sinha et al., 1995). (7) N-Benzoyltetrazole has been developed as a mild and selective reagent for the monobenzoylation of the exocyclic amino groups in adenine and cytosine nucleobases (Bhat et al., 1997). In a…

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    We would like to start by introducing our group which consists of Salome Fregoso, Roxanne Wagstaff, Andrea Lopez, Mehwish Kazi and Angel Mejia, we named our group the Avengers. For our first group assignment we were asked to pick a topic from the three provided on blackboard. We chose option one which is about theories. Our assignments were to interview three parents of children ages 12 months - 5 years and ask them to share some stories about their children and about themselves when they were a…

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    Scientific Method Essay

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    of it one by one. 5. By the second penny, our boat began taking in water and started to descend to the bottom of the bowl. Data Group Pennies Description Group 1 99 Group 2 140 Group 3 53 Group 4 130 Group 5 105 Group 6 200 Group 7 60 Group 8 (Our Group) 2 Post Lab Questions 1. What were the controls (aka constants) of this experiment? • The controls, or constants, of this experiment are the capacity of fluids we used and the quantity of the aluminum foil. We only received one 12…

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    Collaborative Midterm Presentation Process Paper The old proverb, “Many hands make light work,” comes to my mind when I reflect upon our collaborative midterm presentation. At the outset, it became apparent that we all have busy lives with many responsibilities. However, once we began to contribute our thoughts, the work became more manageable. Consequently, the project actually became enjoyable. Our team created an informative and interactive Prezi presentation which added to the ambience…

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    Group Work Self Analysis

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    I was definitely not the best partner to work with this week as I was on vacation until Saturday morning and had little time on my computer. However, Yoselin was super understanding and we used text messaging to have the most efficient conversations about our project. As for group work, I am usually against the idea because I tend to be an introvert who wants to have all the control of what is being submitted. It is sometimes difficult for members of a group to have equal responsibilities.…

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    Moreover, we did not have any problem about the times and dates for our meetings. The requirement for this group project that we had to meet three times before the due date. That was not a big deal for us. The schedules for our meetings were on Wednesday night and Thursday night around seven pm. We decided to meet at library because library has the group study rooms. At there, we could talk and discuss about our project. On the first meeting, everyone came on time. We discussed about the…

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    “Beauty is in the eye of the beholder,” implies that beauty is subjective and that one decides what is beautiful and what is not. However, there are things that are objectively beautiful that were created by God. Beauty fits into Christianity because of these inherent beauties, as seen, in nature, in things that are symmetrical, and in things that have order. Inherently beautiful things were created to draw our attention to value and importance in God’s design. First, God created nature to be…

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    Presentations have never been my strong suit, whether it is talking about myself in front of a group of people to presenting a complex situation to a class. By taking this course I am hoping that I’ll be able to boost my confidence when it comes to public speaking. I have had to complete many presentation in the past but I have yet to master the ability to present well in front of large groups. The first project that we were assigned in my communication class was to get to know our classmate…

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    I liked how you engaged the entire group in labeling your drawing not because you did not know but because you wanted more people to participate in the discussion. Importantly, few times you went back to the case making connections between discussed material and patients symptoms described in the case. We definitely need to do this more often. You also had a very nice case presentation this Friday. I am pleased you shared with me in your reflection that you want to advance your case presentation…

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    On Wednesday, November 11, 2015, I, Anna R. Morrison, was leading my afternoon class, Capstone. Their final assignment was to give a group presentation on the impact of social media. The presentations began around 1:30; each group presenting on the meaning of social media. The presentations were going great as the students had worked very hard with the topic at hand. It was in the second hour of presentations that the reason for this letter presents itself. Mr. Kyle Clevenger, Sophie…

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