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Questions related from Rengwei Sun
As described above. Show me lit. ref. if there are examples. Thanks from a boy inaccessible to scifinder o(╥﹏╥)o
11 November 2019 981 3 View
I am reducing the -CN group（with an α-NHBoc） to a primary amine with Hydrogen & Pd/C in MeOH. However after 24hs' reaction, it gives largely "dimmer-like" byproduct, namely secondary amine....
04 April 2019 2,687 8 View
Chances are that I meet with a power failure while carrying out a Mizoroki-Heck-coupling reaction. The solution was cooled to room temp. before reheated to 100 oC, though the system was still in...
09 September 2017 1,009 8 View
I've been trying using NaBD4/NiCl2·6H2O/Boc2O to reduce nitrile into d2-primary amine. A pretest using NaBH4 ran smoothly but when NaBD4 was used LC-MS showed that the product is a mixture of...
08 August 2017 7,162 11 View
Dear all, I am planning to prepare a hydroxamic acid by the condensation of NH2OH·HCl with carboxylic acid in the presence of base(mostly NaOH). However, my substrate bears a diaryl ketone...
08 August 2017 4,133 3 View
As I used L-4-Hydroxyproline in preparing some new compounds under 120 oC in toluene. However,excessive L-4-Hydroxyproline is needed as the decarboxylation would occur. Now I am in search of...
11 November 2016 5,018 4 View
During my research, I've prepared some volatile low molecular weight product. Unfortunately,after FCC and removal of the solvent, the 1HNMR sample still consist of impurities (mainly H2O, DCM,...
07 July 2016 6,491 5 View
