Accession Number : ADA267385


Title :   Pyrromethene-BF2 Complexes and Laser Dyes: 2


Descriptive Note : Professional paper,


Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA


Personal Author(s) : Boyer, Joseph H ; Haag, Anthony M ; Sathyamoorthi, Govindarao ; Soong, Mou-Ling ; Thangaraj, Kannappan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267385.pdf


Report Date : 16 Jan 1992


Pagination or Media Count : 13


Abstract : Pyrromethene-BF2 complexes (P-BF2) 7 were obtained from alpha- unsubstituted pyrroles 5 by acylation and condensation to give intermediate pyrromethene hydrohalides 6 followed by treatment with boron trifluoride etherate. Conversion of ethyl alpha-pyrrolecarboxylates 4 to alpha-unsubstituted pyrroles 5 was brought about by thermolysis in phosphoric acid at 160 deg C, or by saponification followed by decarboxylation in ethanolamine at 180 deg C, or as unisolated intermediates in the conversion of esters 4 to pyrromethene hydrobromide 6 by heating in a mixture of formic and hydrobromic acids


Descriptors :   *LASERS , *PYRROLES , *DYE LASERS , *FLUORIDES , *BORON , REPRINTS , CONDENSATION , FORMIC ACID , CARBOXYL RADICALS , HYDROGEN CYANIDE , ETHANOLAMINE , PHOSPHORIC ACIDS , METHYLENES , ESTERS , ETHERS , HALIDES , OPTICAL COMMUNICATIONS


Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Lasers and Masers


Distribution Statement : APPROVED FOR PUBLIC RELEASE