Disclosed are compounds of Formula 1, and pharmaceutically acceptable salts thereof, wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are defined in the specification. This disclosure also relates to materials and methods for preparing compounds of Formula 1, to pharmaceutical compositions which contain them, and to their use for treating immunological disorders, cardiovascular disease, cancer, and other diseases, disorders or conditions associated with PI3Kδ.