01138nas a2200217   4500008004100000022001400041245013000055210006900185260009200254300000800346490000800354520028900362653001200651653002200663653003000685653001300715100002000728700001900748700002600767856012700793       2007                        eng d  a1542-140600aUnusual trisulphide linkage in bromine-thiourea reaction: crystal structure of formamidinium trisulphide complex with bromine0 aUnusual trisulphide linkage in brominethiourea reaction crystal   a4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLANDbTAYLOR & FRANCIS LTDcSEP  a69+0 v4693 a<p>{A new complex of formamidinium trisulphide with bromine has been synthesized. Single-crystal X-ray analysis of this compound revealed a novel trisulphide linkage in the formamidinium trisulphide moiety. The crystals belong to orthorhombic space group Fdd2 with a = 14.9119(15)</p>10abromine10acrystal structure10aformamidinium trisulphide10athiourea1 aTol, Abhaya, D.1 aNatu, Arun, D.1 aPuranik, Vedavati, G.  uhttps://library.ncl.res.in/content/unusual-trisulphide-linkage-bromine-thiourea-reaction-crystal-structure-formamidinium-001300nas a2200205   4500008004100000022001400041245014600055210006900201260007500270300001400345520045900359653002600818653001200844653001600856653003200872653002100904100002200925700001900947856012800966       2010                        eng d  a0039-788100aBromine-induced facile synthesis of butenolides and spirobutenolides from sterically congested tetrasubstituted dialkyl alkylidene succinates0 aBromineinduced facile synthesis of butenolides and spirobutenoli  aRUDIGERSTR 14, D-70469 STUTTGART, GERMANYbGEORG THIEME VERLAG KGcAPR  a1188-11943 a<p>Starting from sterically congested tetrasubstituted dialkyl alkylidene succinates, facile general approach to several dialkyl substituted butenolides and spirobutenolides with the generation of quaternary carbon center has been demonstrated via bromine-induced dealkylative regioselective intramolecular cyclization and dehydrobromination pathway. The mechanistic aspects involved in the formation of butenolides have been also described in brief.</p>10aalkylidene succinates10abromine10abutenolides10aintramolecular cyclizations10aspirobutenolides1 aPatel, Ramesh, M.1 aArgade, N., P.  uhttps://library.ncl.res.in/content/bromine-induced-facile-synthesis-butenolides-and-spirobutenolides-sterically-congested-0