01662nas a2200193   4500008004100000022001400041245008600055210006900141260011000210300001200320490000700332520089000339100002201229700002401251700002701275700002401302700002201326856012001348       2015                        eng d  a1144-054600aBile acid hydrazides: gelation, structural, physical and spectroscopic properties0 aBile acid hydrazides gelation structural physical and spectrosco  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a453-4600 v393 a<p>Synthesis and gelation properties of a series of novel bile acid hydrazides are presented. These compounds are found to undergo self-assembly leading to organogelation in certain organic solvents. Compound 1 was found to be the most ``effective'' gelator in this series. The properties of this gel have been thoroughly investigated by conventional methods typical for molecular gel studies. Sol gel transition temperature (T-g) of chloroform gels of compounds 1 and 3 was found to increase with increase in the chain length. Sol-gel transition was probed using the isothermal time test and results show that there is instantaneous increase in both the moduli after shear melting, which suggests that the kinetics of formation of the network was very fast. IR and NMR studies revealed hydrogen bonding between amidic carbonyl in the side chain and hydroxyl groups of cholic acid.</p>1 aPore, Vandana, S.1 aAgalave, Sandip, G.1 aPharande, Shrikant, G.1 aPatil, Prashant, A.1 aKotmale, Amol, S.  uhttps://library.ncl.res.in/content/bile-acid-hydrazides-gelation-structural-physical-and-spectroscopic-properties-001968nas a2200253   4500008004100000022001400041245017900055210006900234260007500303300001400378520096100392653001601353653002301369653001601392653002301408653002601431100001901457700002501476700001801501700001801519700002201537700002401559856013101583       2016                        eng d  a1434-193X00aBronsted-acid-mediated divergent reactions of betti bases with indoles: an approach to chromeno[2,3-b]indoles through intramolecular dehydrogenative C2-alkoxylation of indole0 aBronstedacidmediated divergent reactions of betti bases with ind  aPOSTFACH 101161, 69451 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL  a3441-34483 a<p>Divergent reactions of various 1-(aminoalkyl) naphthols and 2-(aminoalkyl) phenols (commonly known as Betti bases) with indoles under Bronsted acid catalysis is reported. With the reaction strategies, one can efficiently synthesize important indole derivatives such as 3-(alpha,alpha-diarylmethyl)indoles and chromeno[2,3-b]indoles. Furthermore, we disclose here a new C-C bond-cleavage reaction, in which naphthol and phenol behave as leaving groups to produce diarylmethanes. Inexpensive reagents such as p-toluenesulfonic acid monohydrate and molecular iodine are used to catalyze the reactions. No metal catalyst is required. The starting material of the reactions, Betti bases, are easily prepared from a three-component reaction of naphthol/phenol, aldehydes, and secondary amines. The mechanisms for the reactions are established through some control experiments. Quinone methide is the key intermediate for all the reactions reported herein.</p>10aBetti bases10aC-O bond formation10aDearylation10aFused-ring systems10anitrogen heterocycles1 aDeb, Mohit, L.1 aPegu, Choitanya, Dev1 aDeka, Bhaskar1 aDutta, Prantu1 aKotmale, Amol, S.1 aBaruah, Pranjal, K.  uhttps://library.ncl.res.in/content/bronsted-acid-mediated-divergent-reactions-betti-bases-indoles-approach-chromeno23-bindoles