55379-71-0Relevant academic research and scientific papers
Nickel-catalyzed reductive cyclization of alkyl dihalides
Xue, Weichao,Xu, Hailiang,Liang, Zhuye,Qian, Qun,Gong, Hegui
supporting information, p. 4984 - 4987 (2014/12/11)
The reductive coupling protocol to intramolecular cyclization of dihaloalkanes is presented. It leads to five- and six-membered rings, with the former being more efficient. The incorporation of secondary alkyl halides generally promotes coupling efficiency. To the best of our knowledge, this is the first catalytic ring-closure reaction arising from dihaloalkanes under chemical reductive conditions.
Anionic ortho-fries rearrangement, a facile route to arenol-based mannich bases
Assimomytis, Nikos,Sariyannis, Yiannis,Stavropoulos, Georgios,Tsoungas, Petros G.,Varvounis, George,Cordopatis, Paul
scheme or table, p. 2777 - 2782 (2010/03/03)
Phenol and 1-naphthol-based carbamates undergo the anionic ortho-Fries rearrangement to their corresponding amides. Bulky substitution at position 8 of 1-naphthol-based carbamates makes the rearrangement an exclusive reaction, even at -90 C, under a variety of conditions. The amides can be efficiently reduced to the corresponding Mannich bases. A novel route to 7-[(dialkylamino)methyl]-8- hydroxy-1-naphthaldehydes is presented.
Achieving functional group diversity in parallel synthesis: solution-phase synthesis of a library of ureas, carbamates, thiocarbamates, and amides using carbamoylimidazolium salts
Grzyb, Justyna A.,Batey, Robert A.
, p. 5279 - 5282 (2008/12/21)
A convenient protocol for the parallel solution-phase synthesis of a library of thiocarbamates, ureas, carbamates, and amides from carbamoylimidazolium salts has been developed. The crystalline carbamoylimidazolium salts are readily synthesized from secon
A simple method for the preparation of di-, tri- and tetrasubstituted non-symmetrical ureas
Bridgeman, Eve,Tomkinson, Nicholas C. O.
, p. 243 - 246 (2007/10/03)
The synthesis of a series of di-, tri- and tetrasubstituted non-symmetrical ureas is described. Di- and trisubstituted ureas are prepared in excellent yield by treatment of a phenyl carbamate in a self-tunable single-mode microwave synthesizer with a primary or secondary amine. The synthetically more challenging tetrasubstituted urea can be prepared using the 4-nitrophenyl carbamate and a secondary amine. Georg Thieme Verlag Stuttgart.
AZAARENE DERIVATIVES
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Page/Page column 94, (2008/06/13)
A compound represented by the general formula: wherein X1 represents a nitrogen atom or a group represented by the formula -CR10=; X2 represents a nitrogen atom or a group represented by the formula -CR11=; Y represents an oxygen atom or the like; R1 represents a C1-6 alkoxy group, an optionally substituted C6-10 aryloxy group, a group represented by the formula -NR12aR12b or the like; R2 represents a hydrogen atom, an optionally substituted C1-6 alkyl group, or the like; R3, R4, R5, R6, R7, R8, R10 and R11 each independently represent a hydrogen atom, a halogen atom, an optionally substituted C1-6 alkyl group, or the like; R9 represents a group represented by the formula -NR16aR16b or the like; and R12a, R12b, R16a and R16b each independently represent a hydrogen atom, an optionally substituted C1-6 alkyl group, or the like, a salt thereof, or a hydrate of the foregoing.
ortho-anisylsulfonyl as a protecting group for secondary amines: Mild Ni0-catalyzed hydrodesulfonylation
Milburn, Robert R.,Snieckus, Victor
, p. 892 - 894 (2007/10/03)
A potentially good alternative to the tosyl group (Ts) as a protecting group for amines is N-ortho-anisylsulfonyl (Ans), which is readily cleaved under mild, Ni0-catalyzed reductive conditions (see scheme, acac = acetylacetonate). N-Anisylation of primary amines followed by alkylation and deprotection provides a route to a range of secondary amines.
α-Haloalkyl Haloformates and Related Compounds 1. A Convenient Synthesis of Carbamates via Chloromethyl Carbamates
Patonay, Tamas,Patonay-Peli, Erzsebet,Mogyorodi, Ferenc
, p. 2865 - 2885 (2007/10/02)
The preparation of carbamates under mild conditions utilizing a new class of activated carbonates (containing chloromethyl function) is described.
